./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 91d14ac062f05fd105cce7a665423d189aaea162 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 91d14ac062f05fd105cce7a665423d189aaea162 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 19:48:02,353 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:48:02,355 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:48:02,402 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:48:02,402 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:48:02,404 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:48:02,407 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:48:02,410 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:48:02,417 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:48:02,419 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:48:02,420 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:48:02,423 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:48:02,424 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:48:02,430 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:48:02,433 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:48:02,436 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:48:02,438 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:48:02,441 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:48:02,443 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:48:02,450 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:48:02,456 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:48:02,458 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:48:02,461 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:48:02,463 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:48:02,471 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:48:02,472 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:48:02,472 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:48:02,477 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:48:02,481 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:48:02,482 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:48:02,484 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:48:02,485 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:48:02,486 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:48:02,488 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:48:02,490 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:48:02,491 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:48:02,492 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:48:02,492 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:48:02,492 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:48:02,493 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:48:02,494 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:48:02,495 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:48:02,553 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:48:02,554 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:48:02,555 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:48:02,555 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:48:02,557 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:48:02,557 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:48:02,558 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:48:02,558 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:48:02,558 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:48:02,558 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:48:02,560 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:48:02,560 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:48:02,560 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:48:02,561 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:48:02,561 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:48:02,561 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:48:02,561 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:48:02,561 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:48:02,562 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:48:02,562 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:48:02,562 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:48:02,562 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:48:02,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:48:02,563 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:48:02,563 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:48:02,564 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:48:02,564 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:48:02,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:48:02,564 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:48:02,564 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:48:02,565 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:48:02,565 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:48:02,565 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 91d14ac062f05fd105cce7a665423d189aaea162 [2021-10-15 19:48:02,807 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:48:02,834 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:48:02,836 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:48:02,838 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:48:02,839 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:48:02,840 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-1.c [2021-10-15 19:48:02,911 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/data/7e67ce4c4/f15549c64a7a4a2890128b01b5911a30/FLAGa09225636 [2021-10-15 19:48:03,591 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:48:03,591 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-1.c [2021-10-15 19:48:03,611 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/data/7e67ce4c4/f15549c64a7a4a2890128b01b5911a30/FLAGa09225636 [2021-10-15 19:48:03,754 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/data/7e67ce4c4/f15549c64a7a4a2890128b01b5911a30 [2021-10-15 19:48:03,756 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:48:03,759 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:48:03,767 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:48:03,767 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:48:03,771 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:48:03,771 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:48:03" (1/1) ... [2021-10-15 19:48:03,774 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66f8ede3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:48:03, skipping insertion in model container [2021-10-15 19:48:03,774 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:48:03" (1/1) ... [2021-10-15 19:48:03,782 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:48:03,867 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:48:04,316 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-1.c[74369,74382] [2021-10-15 19:48:04,327 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:48:04,343 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:48:04,497 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-1.c[74369,74382] [2021-10-15 19:48:04,501 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:48:04,518 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:48:04,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:48:04 WrapperNode [2021-10-15 19:48:04,518 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:48:04,520 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:48:04,520 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:48:04,520 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:48:04,528 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:48:04" (1/1) ... [2021-10-15 19:48:04,550 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:48:04" (1/1) ... [2021-10-15 19:48:04,618 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:48:04,619 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:48:04,619 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:48:04,620 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:48:04,631 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:48:04" (1/1) ... [2021-10-15 19:48:04,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:48:04" (1/1) ... [2021-10-15 19:48:04,641 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:48:04" (1/1) ... [2021-10-15 19:48:04,655 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:48:04" (1/1) ... [2021-10-15 19:48:04,710 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:48:04" (1/1) ... [2021-10-15 19:48:04,718 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:48:04" (1/1) ... [2021-10-15 19:48:04,722 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:48:04" (1/1) ... [2021-10-15 19:48:04,733 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:48:04,740 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:48:04,740 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:48:04,740 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:48:04,743 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:48:04" (1/1) ... [2021-10-15 19:48:04,753 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:48:04,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:48:04,789 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:48:04,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:48:04,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-15 19:48:04,864 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:48:04,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-15 19:48:04,865 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-15 19:48:04,865 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-15 19:48:04,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:48:04,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-15 19:48:04,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:48:04,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:48:05,107 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-10-15 19:48:06,603 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-10-15 19:48:06,604 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-10-15 19:48:06,619 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:48:06,619 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-15 19:48:06,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:48:06 BoogieIcfgContainer [2021-10-15 19:48:06,622 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:48:06,624 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:48:06,624 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:48:06,628 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:48:06,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:48:03" (1/3) ... [2021-10-15 19:48:06,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f5fe260 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:48:06, skipping insertion in model container [2021-10-15 19:48:06,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:48:04" (2/3) ... [2021-10-15 19:48:06,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f5fe260 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:48:06, skipping insertion in model container [2021-10-15 19:48:06,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:48:06" (3/3) ... [2021-10-15 19:48:06,635 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.11.i.cil-1.c [2021-10-15 19:48:06,640 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:48:06,641 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:48:06,703 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:48:06,712 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-15 19:48:06,713 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:48:06,736 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 150 places, 254 transitions, 508 flow [2021-10-15 19:48:06,805 INFO L129 PetriNetUnfolder]: 105/254 cut-off events. [2021-10-15 19:48:06,816 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:48:06,818 INFO L84 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 254 events. 105/254 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 495 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 0. Up to 26 conditions per place. [2021-10-15 19:48:06,818 INFO L82 GeneralOperation]: Start removeDead. Operand has 150 places, 254 transitions, 508 flow [2021-10-15 19:48:06,828 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 137 places, 210 transitions, 420 flow [2021-10-15 19:48:06,847 INFO L129 PetriNetUnfolder]: 59/168 cut-off events. [2021-10-15 19:48:06,847 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:48:06,847 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:48:06,848 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:48:06,849 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:48:06,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:48:06,858 INFO L82 PathProgramCache]: Analyzing trace with hash -442385417, now seen corresponding path program 1 times [2021-10-15 19:48:06,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:48:06,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898350576] [2021-10-15 19:48:06,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:48:06,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:48:07,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:48:07,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:48:07,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:48:07,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898350576] [2021-10-15 19:48:07,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898350576] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:48:07,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:48:07,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:48:07,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589260613] [2021-10-15 19:48:07,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:48:07,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:48:07,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:48:07,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:48:07,306 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 254 [2021-10-15 19:48:07,314 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 210 transitions, 420 flow. Second operand has 4 states, 4 states have (on average 152.25) internal successors, (609), 4 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:07,314 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:48:07,315 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 254 [2021-10-15 19:48:07,316 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:48:09,947 INFO L129 PetriNetUnfolder]: 86/250 cut-off events. [2021-10-15 19:48:09,948 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:48:09,950 INFO L84 FinitePrefix]: Finished finitePrefix Result has 377 conditions, 250 events. 86/250 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 427 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 9. Up to 104 conditions per place. [2021-10-15 19:48:09,954 INFO L132 encePairwiseOnDemand]: 245/254 looper letters, 117 selfloop transitions, 8 changer transitions 0/233 dead transitions. [2021-10-15 19:48:09,954 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 233 transitions, 716 flow [2021-10-15 19:48:09,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:48:09,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:48:09,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 706 transitions. [2021-10-15 19:48:09,973 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6948818897637795 [2021-10-15 19:48:09,974 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 706 transitions. [2021-10-15 19:48:09,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 706 transitions. [2021-10-15 19:48:09,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:48:09,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 706 transitions. [2021-10-15 19:48:09,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 176.5) internal successors, (706), 4 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:09,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:09,997 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:10,000 INFO L186 Difference]: Start difference. First operand has 137 places, 210 transitions, 420 flow. Second operand 4 states and 706 transitions. [2021-10-15 19:48:10,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 233 transitions, 716 flow [2021-10-15 19:48:10,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 233 transitions, 716 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:48:10,013 INFO L242 Difference]: Finished difference. Result has 142 places, 217 transitions, 476 flow [2021-10-15 19:48:10,015 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=476, PETRI_PLACES=142, PETRI_TRANSITIONS=217} [2021-10-15 19:48:10,016 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 5 predicate places. [2021-10-15 19:48:10,017 INFO L470 AbstractCegarLoop]: Abstraction has has 142 places, 217 transitions, 476 flow [2021-10-15 19:48:10,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 152.25) internal successors, (609), 4 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:10,018 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:48:10,018 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:48:10,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:48:10,019 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:48:10,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:48:10,020 INFO L82 PathProgramCache]: Analyzing trace with hash 277387200, now seen corresponding path program 1 times [2021-10-15 19:48:10,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:48:10,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286794736] [2021-10-15 19:48:10,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:48:10,021 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:48:10,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:48:10,222 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:48:10,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:48:10,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286794736] [2021-10-15 19:48:10,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286794736] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:48:10,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:48:10,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:48:10,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264037117] [2021-10-15 19:48:10,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:48:10,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:48:10,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:48:10,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:48:10,236 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 254 [2021-10-15 19:48:10,237 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 217 transitions, 476 flow. Second operand has 4 states, 4 states have (on average 154.5) internal successors, (618), 4 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:10,237 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:48:10,238 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 254 [2021-10-15 19:48:10,238 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:48:12,740 INFO L129 PetriNetUnfolder]: 85/249 cut-off events. [2021-10-15 19:48:12,740 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-10-15 19:48:12,742 INFO L84 FinitePrefix]: Finished finitePrefix Result has 401 conditions, 249 events. 85/249 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 420 event pairs, 0 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 298. Up to 104 conditions per place. [2021-10-15 19:48:12,744 INFO L132 encePairwiseOnDemand]: 245/254 looper letters, 116 selfloop transitions, 8 changer transitions 0/233 dead transitions. [2021-10-15 19:48:12,744 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 233 transitions, 756 flow [2021-10-15 19:48:12,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:48:12,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:48:12,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 705 transitions. [2021-10-15 19:48:12,752 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6938976377952756 [2021-10-15 19:48:12,753 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 705 transitions. [2021-10-15 19:48:12,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 705 transitions. [2021-10-15 19:48:12,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:48:12,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 705 transitions. [2021-10-15 19:48:12,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 176.25) internal successors, (705), 4 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:12,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:12,772 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:12,772 INFO L186 Difference]: Start difference. First operand has 142 places, 217 transitions, 476 flow. Second operand 4 states and 705 transitions. [2021-10-15 19:48:12,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 233 transitions, 756 flow [2021-10-15 19:48:12,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 233 transitions, 750 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:48:12,789 INFO L242 Difference]: Finished difference. Result has 146 places, 219 transitions, 506 flow [2021-10-15 19:48:12,790 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=506, PETRI_PLACES=146, PETRI_TRANSITIONS=219} [2021-10-15 19:48:12,790 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 9 predicate places. [2021-10-15 19:48:12,790 INFO L470 AbstractCegarLoop]: Abstraction has has 146 places, 219 transitions, 506 flow [2021-10-15 19:48:12,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 154.5) internal successors, (618), 4 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:12,791 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:48:12,792 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:48:12,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:48:12,792 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:48:12,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:48:12,795 INFO L82 PathProgramCache]: Analyzing trace with hash -377731051, now seen corresponding path program 1 times [2021-10-15 19:48:12,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:48:12,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174604949] [2021-10-15 19:48:12,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:48:12,797 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:48:12,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:48:12,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:48:12,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:48:12,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174604949] [2021-10-15 19:48:12,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174604949] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:48:12,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:48:12,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:48:12,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459733043] [2021-10-15 19:48:12,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:48:12,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:48:12,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:48:12,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:48:12,975 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 254 [2021-10-15 19:48:12,976 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 219 transitions, 506 flow. Second operand has 4 states, 4 states have (on average 154.25) internal successors, (617), 4 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:12,977 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:48:12,977 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 254 [2021-10-15 19:48:12,977 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:48:15,472 INFO L129 PetriNetUnfolder]: 84/247 cut-off events. [2021-10-15 19:48:15,472 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2021-10-15 19:48:15,473 INFO L84 FinitePrefix]: Finished finitePrefix Result has 413 conditions, 247 events. 84/247 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 418 event pairs, 0 based on Foata normal form. 0/216 useless extension candidates. Maximal degree in co-relation 301. Up to 104 conditions per place. [2021-10-15 19:48:15,475 INFO L132 encePairwiseOnDemand]: 245/254 looper letters, 115 selfloop transitions, 8 changer transitions 0/232 dead transitions. [2021-10-15 19:48:15,476 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 232 transitions, 778 flow [2021-10-15 19:48:15,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:48:15,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:48:15,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 704 transitions. [2021-10-15 19:48:15,480 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6929133858267716 [2021-10-15 19:48:15,481 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 704 transitions. [2021-10-15 19:48:15,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 704 transitions. [2021-10-15 19:48:15,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:48:15,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 704 transitions. [2021-10-15 19:48:15,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:15,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:15,489 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:15,490 INFO L186 Difference]: Start difference. First operand has 146 places, 219 transitions, 506 flow. Second operand 4 states and 704 transitions. [2021-10-15 19:48:15,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 232 transitions, 778 flow [2021-10-15 19:48:15,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 232 transitions, 772 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:48:15,499 INFO L242 Difference]: Finished difference. Result has 150 places, 221 transitions, 536 flow [2021-10-15 19:48:15,499 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=536, PETRI_PLACES=150, PETRI_TRANSITIONS=221} [2021-10-15 19:48:15,500 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 13 predicate places. [2021-10-15 19:48:15,500 INFO L470 AbstractCegarLoop]: Abstraction has has 150 places, 221 transitions, 536 flow [2021-10-15 19:48:15,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 154.25) internal successors, (617), 4 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:15,501 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:48:15,501 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:48:15,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 19:48:15,502 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:48:15,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:48:15,503 INFO L82 PathProgramCache]: Analyzing trace with hash 487848105, now seen corresponding path program 1 times [2021-10-15 19:48:15,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:48:15,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511467780] [2021-10-15 19:48:15,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:48:15,504 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:48:15,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:48:15,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:48:15,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:48:15,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511467780] [2021-10-15 19:48:15,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511467780] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:48:15,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:48:15,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:48:15,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619681544] [2021-10-15 19:48:15,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:48:15,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:48:15,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:48:15,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:48:15,592 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 254 [2021-10-15 19:48:15,594 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 221 transitions, 536 flow. Second operand has 4 states, 4 states have (on average 154.25) internal successors, (617), 4 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:15,594 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:48:15,594 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 254 [2021-10-15 19:48:15,594 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:48:18,052 INFO L129 PetriNetUnfolder]: 83/246 cut-off events. [2021-10-15 19:48:18,052 INFO L130 PetriNetUnfolder]: For 39/39 co-relation queries the response was YES. [2021-10-15 19:48:18,053 INFO L84 FinitePrefix]: Finished finitePrefix Result has 427 conditions, 246 events. 83/246 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 417 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 304. Up to 104 conditions per place. [2021-10-15 19:48:18,055 INFO L132 encePairwiseOnDemand]: 245/254 looper letters, 115 selfloop transitions, 8 changer transitions 0/232 dead transitions. [2021-10-15 19:48:18,055 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 232 transitions, 804 flow [2021-10-15 19:48:18,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:48:18,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:48:18,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 704 transitions. [2021-10-15 19:48:18,059 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6929133858267716 [2021-10-15 19:48:18,059 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 704 transitions. [2021-10-15 19:48:18,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 704 transitions. [2021-10-15 19:48:18,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:48:18,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 704 transitions. [2021-10-15 19:48:18,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:18,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:18,067 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:18,067 INFO L186 Difference]: Start difference. First operand has 150 places, 221 transitions, 536 flow. Second operand 4 states and 704 transitions. [2021-10-15 19:48:18,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 232 transitions, 804 flow [2021-10-15 19:48:18,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 232 transitions, 798 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:48:18,075 INFO L242 Difference]: Finished difference. Result has 153 places, 222 transitions, 554 flow [2021-10-15 19:48:18,075 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=554, PETRI_PLACES=153, PETRI_TRANSITIONS=222} [2021-10-15 19:48:18,076 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 16 predicate places. [2021-10-15 19:48:18,076 INFO L470 AbstractCegarLoop]: Abstraction has has 153 places, 222 transitions, 554 flow [2021-10-15 19:48:18,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 154.25) internal successors, (617), 4 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:18,077 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:48:18,077 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:48:18,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 19:48:18,077 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:48:18,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:48:18,078 INFO L82 PathProgramCache]: Analyzing trace with hash -441482432, now seen corresponding path program 1 times [2021-10-15 19:48:18,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:48:18,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581203420] [2021-10-15 19:48:18,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:48:18,079 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:48:18,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:48:18,155 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:48:18,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:48:18,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581203420] [2021-10-15 19:48:18,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581203420] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:48:18,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:48:18,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:48:18,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218996952] [2021-10-15 19:48:18,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:48:18,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:48:18,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:48:18,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:48:18,159 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 254 [2021-10-15 19:48:18,181 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 222 transitions, 554 flow. Second operand has 4 states, 4 states have (on average 154.75) internal successors, (619), 4 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:18,182 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:48:18,182 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 254 [2021-10-15 19:48:18,182 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:48:19,179 INFO L129 PetriNetUnfolder]: 82/243 cut-off events. [2021-10-15 19:48:19,180 INFO L130 PetriNetUnfolder]: For 52/52 co-relation queries the response was YES. [2021-10-15 19:48:19,181 INFO L84 FinitePrefix]: Finished finitePrefix Result has 425 conditions, 243 events. 82/243 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 402 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 306. Up to 103 conditions per place. [2021-10-15 19:48:19,183 INFO L132 encePairwiseOnDemand]: 246/254 looper letters, 114 selfloop transitions, 7 changer transitions 0/230 dead transitions. [2021-10-15 19:48:19,183 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 230 transitions, 804 flow [2021-10-15 19:48:19,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:48:19,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:48:19,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 702 transitions. [2021-10-15 19:48:19,187 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6909448818897638 [2021-10-15 19:48:19,187 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 702 transitions. [2021-10-15 19:48:19,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 702 transitions. [2021-10-15 19:48:19,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:48:19,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 702 transitions. [2021-10-15 19:48:19,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 175.5) internal successors, (702), 4 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:19,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:19,195 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:19,195 INFO L186 Difference]: Start difference. First operand has 153 places, 222 transitions, 554 flow. Second operand 4 states and 702 transitions. [2021-10-15 19:48:19,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 230 transitions, 804 flow [2021-10-15 19:48:19,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 230 transitions, 797 flow, removed 1 selfloop flow, removed 1 redundant places. [2021-10-15 19:48:19,203 INFO L242 Difference]: Finished difference. Result has 156 places, 222 transitions, 559 flow [2021-10-15 19:48:19,204 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=537, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=559, PETRI_PLACES=156, PETRI_TRANSITIONS=222} [2021-10-15 19:48:19,204 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 19 predicate places. [2021-10-15 19:48:19,204 INFO L470 AbstractCegarLoop]: Abstraction has has 156 places, 222 transitions, 559 flow [2021-10-15 19:48:19,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 154.75) internal successors, (619), 4 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:19,205 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:48:19,205 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:48:19,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 19:48:19,206 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:48:19,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:48:19,206 INFO L82 PathProgramCache]: Analyzing trace with hash 98663040, now seen corresponding path program 1 times [2021-10-15 19:48:19,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:48:19,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561524591] [2021-10-15 19:48:19,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:48:19,207 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:48:19,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:48:19,285 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:48:19,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:48:19,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561524591] [2021-10-15 19:48:19,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561524591] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:48:19,286 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:48:19,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:48:19,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176245727] [2021-10-15 19:48:19,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:48:19,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:48:19,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:48:19,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:48:19,290 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 254 [2021-10-15 19:48:19,291 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 222 transitions, 559 flow. Second operand has 4 states, 4 states have (on average 154.75) internal successors, (619), 4 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:19,291 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:48:19,291 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 254 [2021-10-15 19:48:19,291 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:48:21,640 INFO L129 PetriNetUnfolder]: 81/241 cut-off events. [2021-10-15 19:48:21,640 INFO L130 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2021-10-15 19:48:21,641 INFO L84 FinitePrefix]: Finished finitePrefix Result has 424 conditions, 241 events. 81/241 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 394 event pairs, 0 based on Foata normal form. 1/212 useless extension candidates. Maximal degree in co-relation 307. Up to 102 conditions per place. [2021-10-15 19:48:21,643 INFO L132 encePairwiseOnDemand]: 247/254 looper letters, 114 selfloop transitions, 6 changer transitions 0/229 dead transitions. [2021-10-15 19:48:21,643 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 229 transitions, 804 flow [2021-10-15 19:48:21,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:48:21,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:48:21,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 701 transitions. [2021-10-15 19:48:21,647 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6899606299212598 [2021-10-15 19:48:21,647 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 701 transitions. [2021-10-15 19:48:21,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 701 transitions. [2021-10-15 19:48:21,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:48:21,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 701 transitions. [2021-10-15 19:48:21,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 175.25) internal successors, (701), 4 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:21,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:21,653 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:21,653 INFO L186 Difference]: Start difference. First operand has 156 places, 222 transitions, 559 flow. Second operand 4 states and 701 transitions. [2021-10-15 19:48:21,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 229 transitions, 804 flow [2021-10-15 19:48:21,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 229 transitions, 798 flow, removed 1 selfloop flow, removed 1 redundant places. [2021-10-15 19:48:21,661 INFO L242 Difference]: Finished difference. Result has 159 places, 221 transitions, 558 flow [2021-10-15 19:48:21,662 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=558, PETRI_PLACES=159, PETRI_TRANSITIONS=221} [2021-10-15 19:48:21,662 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 22 predicate places. [2021-10-15 19:48:21,662 INFO L470 AbstractCegarLoop]: Abstraction has has 159 places, 221 transitions, 558 flow [2021-10-15 19:48:21,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 154.75) internal successors, (619), 4 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:21,663 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:48:21,663 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:48:21,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-15 19:48:21,664 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:48:21,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:48:21,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1550742505, now seen corresponding path program 1 times [2021-10-15 19:48:21,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:48:21,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384408523] [2021-10-15 19:48:21,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:48:21,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:48:21,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:48:21,729 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:48:21,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:48:21,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384408523] [2021-10-15 19:48:21,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384408523] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:48:21,730 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:48:21,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:48:21,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239975372] [2021-10-15 19:48:21,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:48:21,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:48:21,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:48:21,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:48:21,734 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 254 [2021-10-15 19:48:21,735 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 221 transitions, 558 flow. Second operand has 4 states, 4 states have (on average 154.5) internal successors, (618), 4 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:21,735 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:48:21,735 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 254 [2021-10-15 19:48:21,736 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:48:24,149 INFO L129 PetriNetUnfolder]: 80/240 cut-off events. [2021-10-15 19:48:24,149 INFO L130 PetriNetUnfolder]: For 74/74 co-relation queries the response was YES. [2021-10-15 19:48:24,150 INFO L84 FinitePrefix]: Finished finitePrefix Result has 428 conditions, 240 events. 80/240 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 389 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 388. Up to 102 conditions per place. [2021-10-15 19:48:24,152 INFO L132 encePairwiseOnDemand]: 247/254 looper letters, 114 selfloop transitions, 6 changer transitions 0/229 dead transitions. [2021-10-15 19:48:24,152 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 229 transitions, 814 flow [2021-10-15 19:48:24,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:48:24,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:48:24,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 701 transitions. [2021-10-15 19:48:24,156 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6899606299212598 [2021-10-15 19:48:24,156 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 701 transitions. [2021-10-15 19:48:24,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 701 transitions. [2021-10-15 19:48:24,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:48:24,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 701 transitions. [2021-10-15 19:48:24,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 175.25) internal successors, (701), 4 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:24,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:24,163 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:24,164 INFO L186 Difference]: Start difference. First operand has 159 places, 221 transitions, 558 flow. Second operand 4 states and 701 transitions. [2021-10-15 19:48:24,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 229 transitions, 814 flow [2021-10-15 19:48:24,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 229 transitions, 810 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:48:24,171 INFO L242 Difference]: Finished difference. Result has 162 places, 222 transitions, 574 flow [2021-10-15 19:48:24,171 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=554, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=574, PETRI_PLACES=162, PETRI_TRANSITIONS=222} [2021-10-15 19:48:24,172 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 25 predicate places. [2021-10-15 19:48:24,172 INFO L470 AbstractCegarLoop]: Abstraction has has 162 places, 222 transitions, 574 flow [2021-10-15 19:48:24,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 154.5) internal successors, (618), 4 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:24,173 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:48:24,173 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:48:24,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-15 19:48:24,173 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:48:24,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:48:24,174 INFO L82 PathProgramCache]: Analyzing trace with hash -177720082, now seen corresponding path program 1 times [2021-10-15 19:48:24,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:48:24,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232336612] [2021-10-15 19:48:24,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:48:24,175 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:48:24,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:48:24,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:48:24,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:48:24,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232336612] [2021-10-15 19:48:24,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232336612] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:48:24,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:48:24,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:48:24,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851507551] [2021-10-15 19:48:24,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:48:24,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:48:24,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:48:24,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:48:24,244 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 254 [2021-10-15 19:48:24,245 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 222 transitions, 574 flow. Second operand has 4 states, 4 states have (on average 154.75) internal successors, (619), 4 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:24,246 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:48:24,246 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 254 [2021-10-15 19:48:24,246 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:48:26,155 INFO L129 PetriNetUnfolder]: 79/239 cut-off events. [2021-10-15 19:48:26,156 INFO L130 PetriNetUnfolder]: For 95/95 co-relation queries the response was YES. [2021-10-15 19:48:26,157 INFO L84 FinitePrefix]: Finished finitePrefix Result has 434 conditions, 239 events. 79/239 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 384 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 318. Up to 102 conditions per place. [2021-10-15 19:48:26,158 INFO L132 encePairwiseOnDemand]: 247/254 looper letters, 114 selfloop transitions, 6 changer transitions 0/229 dead transitions. [2021-10-15 19:48:26,158 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 229 transitions, 828 flow [2021-10-15 19:48:26,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:48:26,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:48:26,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 701 transitions. [2021-10-15 19:48:26,162 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6899606299212598 [2021-10-15 19:48:26,162 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 701 transitions. [2021-10-15 19:48:26,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 701 transitions. [2021-10-15 19:48:26,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:48:26,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 701 transitions. [2021-10-15 19:48:26,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 175.25) internal successors, (701), 4 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:26,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:26,169 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:26,169 INFO L186 Difference]: Start difference. First operand has 162 places, 222 transitions, 574 flow. Second operand 4 states and 701 transitions. [2021-10-15 19:48:26,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 229 transitions, 828 flow [2021-10-15 19:48:26,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 229 transitions, 824 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:48:26,177 INFO L242 Difference]: Finished difference. Result has 165 places, 223 transitions, 590 flow [2021-10-15 19:48:26,177 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=570, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=590, PETRI_PLACES=165, PETRI_TRANSITIONS=223} [2021-10-15 19:48:26,178 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 28 predicate places. [2021-10-15 19:48:26,178 INFO L470 AbstractCegarLoop]: Abstraction has has 165 places, 223 transitions, 590 flow [2021-10-15 19:48:26,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 154.75) internal successors, (619), 4 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:26,178 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:48:26,179 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:48:26,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-15 19:48:26,179 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:48:26,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:48:26,180 INFO L82 PathProgramCache]: Analyzing trace with hash 816504374, now seen corresponding path program 1 times [2021-10-15 19:48:26,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:48:26,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685993257] [2021-10-15 19:48:26,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:48:26,181 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:48:26,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:48:26,244 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:48:26,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:48:26,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685993257] [2021-10-15 19:48:26,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685993257] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:48:26,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:48:26,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:48:26,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482215015] [2021-10-15 19:48:26,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:48:26,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:48:26,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:48:26,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:48:26,248 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 254 [2021-10-15 19:48:26,249 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 223 transitions, 590 flow. Second operand has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:26,249 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:48:26,250 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 254 [2021-10-15 19:48:26,250 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:48:28,615 INFO L129 PetriNetUnfolder]: 101/304 cut-off events. [2021-10-15 19:48:28,616 INFO L130 PetriNetUnfolder]: For 122/122 co-relation queries the response was YES. [2021-10-15 19:48:28,617 INFO L84 FinitePrefix]: Finished finitePrefix Result has 560 conditions, 304 events. 101/304 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 643 event pairs, 0 based on Foata normal form. 0/266 useless extension candidates. Maximal degree in co-relation 397. Up to 125 conditions per place. [2021-10-15 19:48:28,619 INFO L132 encePairwiseOnDemand]: 244/254 looper letters, 137 selfloop transitions, 10 changer transitions 0/256 dead transitions. [2021-10-15 19:48:28,619 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 256 transitions, 976 flow [2021-10-15 19:48:28,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:48:28,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:48:28,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 716 transitions. [2021-10-15 19:48:28,623 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7047244094488189 [2021-10-15 19:48:28,623 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 716 transitions. [2021-10-15 19:48:28,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 716 transitions. [2021-10-15 19:48:28,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:48:28,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 716 transitions. [2021-10-15 19:48:28,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:28,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:28,630 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:28,630 INFO L186 Difference]: Start difference. First operand has 165 places, 223 transitions, 590 flow. Second operand 4 states and 716 transitions. [2021-10-15 19:48:28,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 256 transitions, 976 flow [2021-10-15 19:48:28,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 256 transitions, 972 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:48:28,639 INFO L242 Difference]: Finished difference. Result has 170 places, 232 transitions, 670 flow [2021-10-15 19:48:28,639 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=586, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=670, PETRI_PLACES=170, PETRI_TRANSITIONS=232} [2021-10-15 19:48:28,640 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 33 predicate places. [2021-10-15 19:48:28,640 INFO L470 AbstractCegarLoop]: Abstraction has has 170 places, 232 transitions, 670 flow [2021-10-15 19:48:28,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:28,641 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:48:28,641 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:48:28,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-15 19:48:28,641 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:48:28,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:48:28,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1756063950, now seen corresponding path program 1 times [2021-10-15 19:48:28,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:48:28,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410611368] [2021-10-15 19:48:28,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:48:28,643 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:48:28,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:48:28,709 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:48:28,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:48:28,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410611368] [2021-10-15 19:48:28,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410611368] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:48:28,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:48:28,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:48:28,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236650901] [2021-10-15 19:48:28,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:48:28,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:48:28,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:48:28,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:48:28,717 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 254 [2021-10-15 19:48:28,718 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 232 transitions, 670 flow. Second operand has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:28,718 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:48:28,719 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 254 [2021-10-15 19:48:28,719 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:48:31,090 INFO L129 PetriNetUnfolder]: 97/290 cut-off events. [2021-10-15 19:48:31,091 INFO L130 PetriNetUnfolder]: For 99/99 co-relation queries the response was YES. [2021-10-15 19:48:31,092 INFO L84 FinitePrefix]: Finished finitePrefix Result has 562 conditions, 290 events. 97/290 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 485 event pairs, 0 based on Foata normal form. 1/256 useless extension candidates. Maximal degree in co-relation 461. Up to 133 conditions per place. [2021-10-15 19:48:31,094 INFO L132 encePairwiseOnDemand]: 249/254 looper letters, 117 selfloop transitions, 4 changer transitions 0/231 dead transitions. [2021-10-15 19:48:31,094 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 231 transitions, 888 flow [2021-10-15 19:48:31,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:48:31,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:48:31,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 694 transitions. [2021-10-15 19:48:31,097 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6830708661417323 [2021-10-15 19:48:31,097 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 694 transitions. [2021-10-15 19:48:31,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 694 transitions. [2021-10-15 19:48:31,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:48:31,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 694 transitions. [2021-10-15 19:48:31,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 173.5) internal successors, (694), 4 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:31,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:31,104 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:31,104 INFO L186 Difference]: Start difference. First operand has 170 places, 232 transitions, 670 flow. Second operand 4 states and 694 transitions. [2021-10-15 19:48:31,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 231 transitions, 888 flow [2021-10-15 19:48:31,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 231 transitions, 880 flow, removed 4 selfloop flow, removed 0 redundant places. [2021-10-15 19:48:31,112 INFO L242 Difference]: Finished difference. Result has 174 places, 230 transitions, 648 flow [2021-10-15 19:48:31,113 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=636, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=648, PETRI_PLACES=174, PETRI_TRANSITIONS=230} [2021-10-15 19:48:31,113 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 37 predicate places. [2021-10-15 19:48:31,113 INFO L470 AbstractCegarLoop]: Abstraction has has 174 places, 230 transitions, 648 flow [2021-10-15 19:48:31,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:31,114 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:48:31,114 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:48:31,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-15 19:48:31,115 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:48:31,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:48:31,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1401698467, now seen corresponding path program 1 times [2021-10-15 19:48:31,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:48:31,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684730158] [2021-10-15 19:48:31,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:48:31,116 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:48:31,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:48:31,186 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:48:31,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:48:31,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684730158] [2021-10-15 19:48:31,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684730158] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:48:31,187 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:48:31,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:48:31,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070159671] [2021-10-15 19:48:31,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:48:31,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:48:31,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:48:31,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:48:31,190 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 254 [2021-10-15 19:48:31,191 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 230 transitions, 648 flow. Second operand has 4 states, 4 states have (on average 157.5) internal successors, (630), 4 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:31,191 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:48:31,191 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 254 [2021-10-15 19:48:31,191 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:48:32,274 INFO L129 PetriNetUnfolder]: 96/289 cut-off events. [2021-10-15 19:48:32,275 INFO L130 PetriNetUnfolder]: For 106/106 co-relation queries the response was YES. [2021-10-15 19:48:32,276 INFO L84 FinitePrefix]: Finished finitePrefix Result has 564 conditions, 289 events. 96/289 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 474 event pairs, 0 based on Foata normal form. 0/253 useless extension candidates. Maximal degree in co-relation 480. Up to 118 conditions per place. [2021-10-15 19:48:32,277 INFO L132 encePairwiseOnDemand]: 244/254 looper letters, 134 selfloop transitions, 10 changer transitions 0/254 dead transitions. [2021-10-15 19:48:32,278 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 254 transitions, 1004 flow [2021-10-15 19:48:32,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:48:32,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:48:32,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 715 transitions. [2021-10-15 19:48:32,281 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7037401574803149 [2021-10-15 19:48:32,281 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 715 transitions. [2021-10-15 19:48:32,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 715 transitions. [2021-10-15 19:48:32,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:48:32,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 715 transitions. [2021-10-15 19:48:32,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 178.75) internal successors, (715), 4 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:32,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:32,289 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:32,290 INFO L186 Difference]: Start difference. First operand has 174 places, 230 transitions, 648 flow. Second operand 4 states and 715 transitions. [2021-10-15 19:48:32,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 254 transitions, 1004 flow [2021-10-15 19:48:32,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 254 transitions, 1002 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:48:32,298 INFO L242 Difference]: Finished difference. Result has 178 places, 232 transitions, 692 flow [2021-10-15 19:48:32,299 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=646, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=692, PETRI_PLACES=178, PETRI_TRANSITIONS=232} [2021-10-15 19:48:32,299 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 41 predicate places. [2021-10-15 19:48:32,299 INFO L470 AbstractCegarLoop]: Abstraction has has 178 places, 232 transitions, 692 flow [2021-10-15 19:48:32,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 157.5) internal successors, (630), 4 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:32,300 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:48:32,300 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:48:32,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-15 19:48:32,301 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:48:32,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:48:32,301 INFO L82 PathProgramCache]: Analyzing trace with hash 116179858, now seen corresponding path program 1 times [2021-10-15 19:48:32,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:48:32,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041754133] [2021-10-15 19:48:32,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:48:32,302 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:48:32,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:48:32,389 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:48:32,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:48:32,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041754133] [2021-10-15 19:48:32,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041754133] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:48:32,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:48:32,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:48:32,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640822516] [2021-10-15 19:48:32,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:48:32,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:48:32,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:48:32,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:48:32,394 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 254 [2021-10-15 19:48:32,395 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 232 transitions, 692 flow. Second operand has 4 states, 4 states have (on average 157.25) internal successors, (629), 4 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:32,395 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:48:32,395 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 254 [2021-10-15 19:48:32,395 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:48:34,077 INFO L129 PetriNetUnfolder]: 95/287 cut-off events. [2021-10-15 19:48:34,077 INFO L130 PetriNetUnfolder]: For 155/155 co-relation queries the response was YES. [2021-10-15 19:48:34,078 INFO L84 FinitePrefix]: Finished finitePrefix Result has 582 conditions, 287 events. 95/287 cut-off events. For 155/155 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 471 event pairs, 0 based on Foata normal form. 0/251 useless extension candidates. Maximal degree in co-relation 496. Up to 118 conditions per place. [2021-10-15 19:48:34,080 INFO L132 encePairwiseOnDemand]: 244/254 looper letters, 133 selfloop transitions, 10 changer transitions 0/253 dead transitions. [2021-10-15 19:48:34,080 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 253 transitions, 1036 flow [2021-10-15 19:48:34,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:48:34,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:48:34,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 714 transitions. [2021-10-15 19:48:34,084 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.702755905511811 [2021-10-15 19:48:34,084 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 714 transitions. [2021-10-15 19:48:34,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 714 transitions. [2021-10-15 19:48:34,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:48:34,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 714 transitions. [2021-10-15 19:48:34,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 178.5) internal successors, (714), 4 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:34,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:34,091 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:34,091 INFO L186 Difference]: Start difference. First operand has 178 places, 232 transitions, 692 flow. Second operand 4 states and 714 transitions. [2021-10-15 19:48:34,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 253 transitions, 1036 flow [2021-10-15 19:48:34,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 253 transitions, 1024 flow, removed 2 selfloop flow, removed 1 redundant places. [2021-10-15 19:48:34,100 INFO L242 Difference]: Finished difference. Result has 182 places, 234 transitions, 726 flow [2021-10-15 19:48:34,101 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=680, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=726, PETRI_PLACES=182, PETRI_TRANSITIONS=234} [2021-10-15 19:48:34,101 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 45 predicate places. [2021-10-15 19:48:34,101 INFO L470 AbstractCegarLoop]: Abstraction has has 182 places, 234 transitions, 726 flow [2021-10-15 19:48:34,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 157.25) internal successors, (629), 4 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:34,102 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:48:34,102 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:48:34,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-15 19:48:34,103 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:48:34,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:48:34,103 INFO L82 PathProgramCache]: Analyzing trace with hash 981759014, now seen corresponding path program 1 times [2021-10-15 19:48:34,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:48:34,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632657484] [2021-10-15 19:48:34,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:48:34,104 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:48:34,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:48:34,187 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:48:34,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:48:34,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632657484] [2021-10-15 19:48:34,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632657484] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:48:34,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:48:34,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:48:34,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740541297] [2021-10-15 19:48:34,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:48:34,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:48:34,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:48:34,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:48:34,192 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 254 [2021-10-15 19:48:34,193 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 234 transitions, 726 flow. Second operand has 4 states, 4 states have (on average 157.25) internal successors, (629), 4 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:34,193 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:48:34,193 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 254 [2021-10-15 19:48:34,194 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:48:36,237 INFO L129 PetriNetUnfolder]: 94/286 cut-off events. [2021-10-15 19:48:36,237 INFO L130 PetriNetUnfolder]: For 199/199 co-relation queries the response was YES. [2021-10-15 19:48:36,238 INFO L84 FinitePrefix]: Finished finitePrefix Result has 595 conditions, 286 events. 94/286 cut-off events. For 199/199 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 474 event pairs, 0 based on Foata normal form. 0/250 useless extension candidates. Maximal degree in co-relation 507. Up to 118 conditions per place. [2021-10-15 19:48:36,240 INFO L132 encePairwiseOnDemand]: 244/254 looper letters, 133 selfloop transitions, 10 changer transitions 0/253 dead transitions. [2021-10-15 19:48:36,240 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 253 transitions, 1062 flow [2021-10-15 19:48:36,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:48:36,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:48:36,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 714 transitions. [2021-10-15 19:48:36,244 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.702755905511811 [2021-10-15 19:48:36,244 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 714 transitions. [2021-10-15 19:48:36,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 714 transitions. [2021-10-15 19:48:36,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:48:36,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 714 transitions. [2021-10-15 19:48:36,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 178.5) internal successors, (714), 4 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:36,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:36,251 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:36,252 INFO L186 Difference]: Start difference. First operand has 182 places, 234 transitions, 726 flow. Second operand 4 states and 714 transitions. [2021-10-15 19:48:36,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 253 transitions, 1062 flow [2021-10-15 19:48:36,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 253 transitions, 1050 flow, removed 2 selfloop flow, removed 1 redundant places. [2021-10-15 19:48:36,261 INFO L242 Difference]: Finished difference. Result has 185 places, 235 transitions, 744 flow [2021-10-15 19:48:36,262 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=714, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=744, PETRI_PLACES=185, PETRI_TRANSITIONS=235} [2021-10-15 19:48:36,262 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 48 predicate places. [2021-10-15 19:48:36,262 INFO L470 AbstractCegarLoop]: Abstraction has has 185 places, 235 transitions, 744 flow [2021-10-15 19:48:36,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 157.25) internal successors, (629), 4 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:36,263 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:48:36,263 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:48:36,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-15 19:48:36,264 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:48:36,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:48:36,264 INFO L82 PathProgramCache]: Analyzing trace with hash 52428477, now seen corresponding path program 1 times [2021-10-15 19:48:36,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:48:36,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169011824] [2021-10-15 19:48:36,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:48:36,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:48:36,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:48:36,333 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:48:36,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:48:36,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169011824] [2021-10-15 19:48:36,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169011824] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:48:36,334 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:48:36,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:48:36,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490324199] [2021-10-15 19:48:36,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:48:36,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:48:36,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:48:36,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:48:36,337 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 254 [2021-10-15 19:48:36,338 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 235 transitions, 744 flow. Second operand has 4 states, 4 states have (on average 157.75) internal successors, (631), 4 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:36,338 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:48:36,338 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 254 [2021-10-15 19:48:36,338 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:48:38,667 INFO L129 PetriNetUnfolder]: 93/283 cut-off events. [2021-10-15 19:48:38,667 INFO L130 PetriNetUnfolder]: For 211/211 co-relation queries the response was YES. [2021-10-15 19:48:38,668 INFO L84 FinitePrefix]: Finished finitePrefix Result has 590 conditions, 283 events. 93/283 cut-off events. For 211/211 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 462 event pairs, 0 based on Foata normal form. 0/247 useless extension candidates. Maximal degree in co-relation 501. Up to 117 conditions per place. [2021-10-15 19:48:38,670 INFO L132 encePairwiseOnDemand]: 245/254 looper letters, 132 selfloop transitions, 9 changer transitions 0/251 dead transitions. [2021-10-15 19:48:38,670 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 251 transitions, 1058 flow [2021-10-15 19:48:38,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:48:38,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:48:38,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 712 transitions. [2021-10-15 19:48:38,674 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7007874015748031 [2021-10-15 19:48:38,674 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 712 transitions. [2021-10-15 19:48:38,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 712 transitions. [2021-10-15 19:48:38,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:48:38,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 712 transitions. [2021-10-15 19:48:38,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:38,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:38,681 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:38,682 INFO L186 Difference]: Start difference. First operand has 185 places, 235 transitions, 744 flow. Second operand 4 states and 712 transitions. [2021-10-15 19:48:38,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 251 transitions, 1058 flow [2021-10-15 19:48:38,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 251 transitions, 1047 flow, removed 2 selfloop flow, removed 1 redundant places. [2021-10-15 19:48:38,691 INFO L242 Difference]: Finished difference. Result has 188 places, 235 transitions, 749 flow [2021-10-15 19:48:38,692 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=721, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=749, PETRI_PLACES=188, PETRI_TRANSITIONS=235} [2021-10-15 19:48:38,692 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 51 predicate places. [2021-10-15 19:48:38,692 INFO L470 AbstractCegarLoop]: Abstraction has has 188 places, 235 transitions, 749 flow [2021-10-15 19:48:38,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 157.75) internal successors, (631), 4 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:38,693 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:48:38,693 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:48:38,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-15 19:48:38,694 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:48:38,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:48:38,694 INFO L82 PathProgramCache]: Analyzing trace with hash 592573949, now seen corresponding path program 1 times [2021-10-15 19:48:38,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:48:38,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408703765] [2021-10-15 19:48:38,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:48:38,695 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:48:38,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:48:38,764 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:48:38,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:48:38,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408703765] [2021-10-15 19:48:38,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408703765] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:48:38,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:48:38,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:48:38,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999493095] [2021-10-15 19:48:38,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:48:38,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:48:38,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:48:38,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:48:38,768 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 254 [2021-10-15 19:48:38,769 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 235 transitions, 749 flow. Second operand has 4 states, 4 states have (on average 157.75) internal successors, (631), 4 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:38,769 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:48:38,769 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 254 [2021-10-15 19:48:38,769 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:48:39,822 INFO L129 PetriNetUnfolder]: 92/281 cut-off events. [2021-10-15 19:48:39,822 INFO L130 PetriNetUnfolder]: For 214/214 co-relation queries the response was YES. [2021-10-15 19:48:39,824 INFO L84 FinitePrefix]: Finished finitePrefix Result has 587 conditions, 281 events. 92/281 cut-off events. For 214/214 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 445 event pairs, 0 based on Foata normal form. 1/247 useless extension candidates. Maximal degree in co-relation 497. Up to 116 conditions per place. [2021-10-15 19:48:39,825 INFO L132 encePairwiseOnDemand]: 246/254 looper letters, 132 selfloop transitions, 8 changer transitions 0/250 dead transitions. [2021-10-15 19:48:39,825 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 250 transitions, 1056 flow [2021-10-15 19:48:39,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:48:39,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:48:39,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 711 transitions. [2021-10-15 19:48:39,829 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6998031496062992 [2021-10-15 19:48:39,829 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 711 transitions. [2021-10-15 19:48:39,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 711 transitions. [2021-10-15 19:48:39,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:48:39,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 711 transitions. [2021-10-15 19:48:39,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 177.75) internal successors, (711), 4 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:39,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:39,836 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:39,836 INFO L186 Difference]: Start difference. First operand has 188 places, 235 transitions, 749 flow. Second operand 4 states and 711 transitions. [2021-10-15 19:48:39,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 250 transitions, 1056 flow [2021-10-15 19:48:39,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 250 transitions, 1046 flow, removed 2 selfloop flow, removed 1 redundant places. [2021-10-15 19:48:39,845 INFO L242 Difference]: Finished difference. Result has 191 places, 235 transitions, 752 flow [2021-10-15 19:48:39,846 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=726, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=752, PETRI_PLACES=191, PETRI_TRANSITIONS=235} [2021-10-15 19:48:39,846 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 54 predicate places. [2021-10-15 19:48:39,847 INFO L470 AbstractCegarLoop]: Abstraction has has 191 places, 235 transitions, 752 flow [2021-10-15 19:48:39,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 157.75) internal successors, (631), 4 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:39,847 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:48:39,848 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:48:39,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-15 19:48:39,848 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:48:39,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:48:39,849 INFO L82 PathProgramCache]: Analyzing trace with hash -317888500, now seen corresponding path program 1 times [2021-10-15 19:48:39,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:48:39,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423407701] [2021-10-15 19:48:39,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:48:39,850 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:48:39,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:48:39,930 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:48:39,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:48:39,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423407701] [2021-10-15 19:48:39,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423407701] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:48:39,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:48:39,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:48:39,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044290800] [2021-10-15 19:48:39,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:48:39,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:48:39,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:48:39,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:48:39,937 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 254 [2021-10-15 19:48:39,938 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 235 transitions, 752 flow. Second operand has 4 states, 4 states have (on average 157.5) internal successors, (630), 4 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:39,939 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:48:39,939 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 254 [2021-10-15 19:48:39,939 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:48:42,300 INFO L129 PetriNetUnfolder]: 91/280 cut-off events. [2021-10-15 19:48:42,300 INFO L130 PetriNetUnfolder]: For 236/236 co-relation queries the response was YES. [2021-10-15 19:48:42,301 INFO L84 FinitePrefix]: Finished finitePrefix Result has 591 conditions, 280 events. 91/280 cut-off events. For 236/236 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 446 event pairs, 0 based on Foata normal form. 0/244 useless extension candidates. Maximal degree in co-relation 500. Up to 116 conditions per place. [2021-10-15 19:48:42,303 INFO L132 encePairwiseOnDemand]: 246/254 looper letters, 132 selfloop transitions, 8 changer transitions 0/250 dead transitions. [2021-10-15 19:48:42,303 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 250 transitions, 1068 flow [2021-10-15 19:48:42,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:48:42,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:48:42,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 711 transitions. [2021-10-15 19:48:42,307 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6998031496062992 [2021-10-15 19:48:42,307 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 711 transitions. [2021-10-15 19:48:42,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 711 transitions. [2021-10-15 19:48:42,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:48:42,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 711 transitions. [2021-10-15 19:48:42,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 177.75) internal successors, (711), 4 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:42,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:42,314 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:42,314 INFO L186 Difference]: Start difference. First operand has 191 places, 235 transitions, 752 flow. Second operand 4 states and 711 transitions. [2021-10-15 19:48:42,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 250 transitions, 1068 flow [2021-10-15 19:48:42,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 250 transitions, 1060 flow, removed 1 selfloop flow, removed 1 redundant places. [2021-10-15 19:48:42,324 INFO L242 Difference]: Finished difference. Result has 194 places, 236 transitions, 770 flow [2021-10-15 19:48:42,324 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=744, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=770, PETRI_PLACES=194, PETRI_TRANSITIONS=236} [2021-10-15 19:48:42,325 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 57 predicate places. [2021-10-15 19:48:42,325 INFO L470 AbstractCegarLoop]: Abstraction has has 194 places, 236 transitions, 770 flow [2021-10-15 19:48:42,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 157.5) internal successors, (630), 4 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:42,326 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:48:42,326 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:48:42,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-15 19:48:42,327 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:48:42,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:48:42,339 INFO L82 PathProgramCache]: Analyzing trace with hash 2024260907, now seen corresponding path program 1 times [2021-10-15 19:48:42,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:48:42,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101813696] [2021-10-15 19:48:42,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:48:42,340 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:48:42,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:48:42,398 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:48:42,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:48:42,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101813696] [2021-10-15 19:48:42,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101813696] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:48:42,399 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:48:42,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:48:42,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145046774] [2021-10-15 19:48:42,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:48:42,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:48:42,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:48:42,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:48:42,403 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 254 [2021-10-15 19:48:42,404 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 236 transitions, 770 flow. Second operand has 4 states, 4 states have (on average 157.75) internal successors, (631), 4 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:42,405 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:48:42,405 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 254 [2021-10-15 19:48:42,405 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:48:44,731 INFO L129 PetriNetUnfolder]: 90/279 cut-off events. [2021-10-15 19:48:44,731 INFO L130 PetriNetUnfolder]: For 261/261 co-relation queries the response was YES. [2021-10-15 19:48:44,732 INFO L84 FinitePrefix]: Finished finitePrefix Result has 596 conditions, 279 events. 90/279 cut-off events. For 261/261 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 438 event pairs, 0 based on Foata normal form. 0/243 useless extension candidates. Maximal degree in co-relation 487. Up to 116 conditions per place. [2021-10-15 19:48:44,733 INFO L132 encePairwiseOnDemand]: 246/254 looper letters, 132 selfloop transitions, 8 changer transitions 0/250 dead transitions. [2021-10-15 19:48:44,734 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 250 transitions, 1082 flow [2021-10-15 19:48:44,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:48:44,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:48:44,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 711 transitions. [2021-10-15 19:48:44,737 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6998031496062992 [2021-10-15 19:48:44,737 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 711 transitions. [2021-10-15 19:48:44,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 711 transitions. [2021-10-15 19:48:44,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:48:44,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 711 transitions. [2021-10-15 19:48:44,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 177.75) internal successors, (711), 4 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:44,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:44,744 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:44,744 INFO L186 Difference]: Start difference. First operand has 194 places, 236 transitions, 770 flow. Second operand 4 states and 711 transitions. [2021-10-15 19:48:44,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 250 transitions, 1082 flow [2021-10-15 19:48:44,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 250 transitions, 1072 flow, removed 2 selfloop flow, removed 1 redundant places. [2021-10-15 19:48:44,754 INFO L242 Difference]: Finished difference. Result has 197 places, 237 transitions, 786 flow [2021-10-15 19:48:44,754 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=760, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=786, PETRI_PLACES=197, PETRI_TRANSITIONS=237} [2021-10-15 19:48:44,755 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 60 predicate places. [2021-10-15 19:48:44,755 INFO L470 AbstractCegarLoop]: Abstraction has has 197 places, 237 transitions, 786 flow [2021-10-15 19:48:44,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 157.75) internal successors, (631), 4 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:44,755 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:48:44,756 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:48:44,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-15 19:48:44,756 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:48:44,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:48:44,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1297997873, now seen corresponding path program 1 times [2021-10-15 19:48:44,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:48:44,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496025033] [2021-10-15 19:48:44,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:48:44,776 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:48:44,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:48:44,830 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:48:44,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:48:44,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496025033] [2021-10-15 19:48:44,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496025033] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:48:44,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:48:44,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:48:44,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458300423] [2021-10-15 19:48:44,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:48:44,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:48:44,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:48:44,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:48:44,835 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 254 [2021-10-15 19:48:44,835 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 237 transitions, 786 flow. Second operand has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:44,836 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:48:44,836 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 254 [2021-10-15 19:48:44,836 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:48:47,150 INFO L129 PetriNetUnfolder]: 86/265 cut-off events. [2021-10-15 19:48:47,150 INFO L130 PetriNetUnfolder]: For 206/206 co-relation queries the response was YES. [2021-10-15 19:48:47,151 INFO L84 FinitePrefix]: Finished finitePrefix Result has 570 conditions, 265 events. 86/265 cut-off events. For 206/206 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 383 event pairs, 0 based on Foata normal form. 1/233 useless extension candidates. Maximal degree in co-relation 478. Up to 114 conditions per place. [2021-10-15 19:48:47,153 INFO L132 encePairwiseOnDemand]: 248/254 looper letters, 127 selfloop transitions, 6 changer transitions 0/243 dead transitions. [2021-10-15 19:48:47,153 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 243 transitions, 1038 flow [2021-10-15 19:48:47,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:48:47,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:48:47,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 704 transitions. [2021-10-15 19:48:47,157 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6929133858267716 [2021-10-15 19:48:47,157 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 704 transitions. [2021-10-15 19:48:47,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 704 transitions. [2021-10-15 19:48:47,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:48:47,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 704 transitions. [2021-10-15 19:48:47,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:47,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:47,164 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:47,164 INFO L186 Difference]: Start difference. First operand has 197 places, 237 transitions, 786 flow. Second operand 4 states and 704 transitions. [2021-10-15 19:48:47,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 243 transitions, 1038 flow [2021-10-15 19:48:47,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 243 transitions, 1028 flow, removed 3 selfloop flow, removed 1 redundant places. [2021-10-15 19:48:47,173 INFO L242 Difference]: Finished difference. Result has 200 places, 235 transitions, 760 flow [2021-10-15 19:48:47,174 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=744, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=760, PETRI_PLACES=200, PETRI_TRANSITIONS=235} [2021-10-15 19:48:47,174 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 63 predicate places. [2021-10-15 19:48:47,174 INFO L470 AbstractCegarLoop]: Abstraction has has 200 places, 235 transitions, 760 flow [2021-10-15 19:48:47,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:47,175 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:48:47,175 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:48:47,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-15 19:48:47,176 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:48:47,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:48:47,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1305734062, now seen corresponding path program 1 times [2021-10-15 19:48:47,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:48:47,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199713666] [2021-10-15 19:48:47,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:48:47,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:48:47,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:48:47,228 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:48:47,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:48:47,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199713666] [2021-10-15 19:48:47,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199713666] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:48:47,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:48:47,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:48:47,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140226223] [2021-10-15 19:48:47,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:48:47,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:48:47,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:48:47,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:48:47,233 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 254 [2021-10-15 19:48:47,234 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 235 transitions, 760 flow. Second operand has 3 states, 3 states have (on average 231.33333333333334) internal successors, (694), 3 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:47,234 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:48:47,234 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 254 [2021-10-15 19:48:47,235 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:48:47,298 INFO L129 PetriNetUnfolder]: 94/302 cut-off events. [2021-10-15 19:48:47,298 INFO L130 PetriNetUnfolder]: For 301/301 co-relation queries the response was YES. [2021-10-15 19:48:47,300 INFO L84 FinitePrefix]: Finished finitePrefix Result has 563 conditions, 302 events. 94/302 cut-off events. For 301/301 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 525 event pairs, 0 based on Foata normal form. 0/213 useless extension candidates. Maximal degree in co-relation 483. Up to 26 conditions per place. [2021-10-15 19:48:47,301 INFO L132 encePairwiseOnDemand]: 251/254 looper letters, 21 selfloop transitions, 2 changer transitions 0/237 dead transitions. [2021-10-15 19:48:47,301 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 237 transitions, 810 flow [2021-10-15 19:48:47,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:48:47,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:48:47,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 715 transitions. [2021-10-15 19:48:47,305 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9383202099737533 [2021-10-15 19:48:47,305 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 715 transitions. [2021-10-15 19:48:47,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 715 transitions. [2021-10-15 19:48:47,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:48:47,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 715 transitions. [2021-10-15 19:48:47,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 238.33333333333334) internal successors, (715), 3 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:47,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:47,311 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:47,311 INFO L186 Difference]: Start difference. First operand has 200 places, 235 transitions, 760 flow. Second operand 3 states and 715 transitions. [2021-10-15 19:48:47,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 237 transitions, 810 flow [2021-10-15 19:48:47,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 237 transitions, 806 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:48:47,323 INFO L242 Difference]: Finished difference. Result has 202 places, 236 transitions, 768 flow [2021-10-15 19:48:47,324 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=768, PETRI_PLACES=202, PETRI_TRANSITIONS=236} [2021-10-15 19:48:47,325 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 65 predicate places. [2021-10-15 19:48:47,325 INFO L470 AbstractCegarLoop]: Abstraction has has 202 places, 236 transitions, 768 flow [2021-10-15 19:48:47,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 231.33333333333334) internal successors, (694), 3 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:47,326 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:48:47,326 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:48:47,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-15 19:48:47,327 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:48:47,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:48:47,329 INFO L82 PathProgramCache]: Analyzing trace with hash 2000452208, now seen corresponding path program 1 times [2021-10-15 19:48:47,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:48:47,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375057363] [2021-10-15 19:48:47,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:48:47,330 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:48:47,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:48:47,432 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-15 19:48:47,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:48:47,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375057363] [2021-10-15 19:48:47,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375057363] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:48:47,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:48:47,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:48:47,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800917197] [2021-10-15 19:48:47,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:48:47,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:48:47,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:48:47,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:48:47,437 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 254 [2021-10-15 19:48:47,438 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 236 transitions, 768 flow. Second operand has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:47,438 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:48:47,438 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 254 [2021-10-15 19:48:47,438 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:48:49,910 INFO L129 PetriNetUnfolder]: 120/380 cut-off events. [2021-10-15 19:48:49,910 INFO L130 PetriNetUnfolder]: For 367/367 co-relation queries the response was YES. [2021-10-15 19:48:49,912 INFO L84 FinitePrefix]: Finished finitePrefix Result has 879 conditions, 380 events. 120/380 cut-off events. For 367/367 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 823 event pairs, 1 based on Foata normal form. 0/339 useless extension candidates. Maximal degree in co-relation 782. Up to 161 conditions per place. [2021-10-15 19:48:49,914 INFO L132 encePairwiseOnDemand]: 243/254 looper letters, 152 selfloop transitions, 11 changer transitions 0/274 dead transitions. [2021-10-15 19:48:49,914 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 274 transitions, 1232 flow [2021-10-15 19:48:49,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:48:49,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:48:49,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 721 transitions. [2021-10-15 19:48:49,918 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7096456692913385 [2021-10-15 19:48:49,918 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 721 transitions. [2021-10-15 19:48:49,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 721 transitions. [2021-10-15 19:48:49,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:48:49,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 721 transitions. [2021-10-15 19:48:49,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 180.25) internal successors, (721), 4 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:49,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:49,924 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:49,924 INFO L186 Difference]: Start difference. First operand has 202 places, 236 transitions, 768 flow. Second operand 4 states and 721 transitions. [2021-10-15 19:48:49,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 274 transitions, 1232 flow [2021-10-15 19:48:49,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 274 transitions, 1230 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:48:49,935 INFO L242 Difference]: Finished difference. Result has 207 places, 246 transitions, 872 flow [2021-10-15 19:48:49,936 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=766, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=872, PETRI_PLACES=207, PETRI_TRANSITIONS=246} [2021-10-15 19:48:49,936 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 70 predicate places. [2021-10-15 19:48:49,936 INFO L470 AbstractCegarLoop]: Abstraction has has 207 places, 246 transitions, 872 flow [2021-10-15 19:48:49,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:49,937 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:48:49,937 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:48:49,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-15 19:48:49,937 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:48:49,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:48:49,938 INFO L82 PathProgramCache]: Analyzing trace with hash -2145227732, now seen corresponding path program 1 times [2021-10-15 19:48:49,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:48:49,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002433252] [2021-10-15 19:48:49,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:48:49,938 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:48:49,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:48:50,030 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-15 19:48:50,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:48:50,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002433252] [2021-10-15 19:48:50,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002433252] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:48:50,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:48:50,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:48:50,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843139944] [2021-10-15 19:48:50,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:48:50,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:48:50,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:48:50,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:48:50,036 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 254 [2021-10-15 19:48:50,037 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 246 transitions, 872 flow. Second operand has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:50,037 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:48:50,037 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 254 [2021-10-15 19:48:50,037 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:48:51,835 INFO L129 PetriNetUnfolder]: 177/544 cut-off events. [2021-10-15 19:48:51,836 INFO L130 PetriNetUnfolder]: For 558/558 co-relation queries the response was YES. [2021-10-15 19:48:51,838 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1241 conditions, 544 events. 177/544 cut-off events. For 558/558 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1445 event pairs, 1 based on Foata normal form. 0/492 useless extension candidates. Maximal degree in co-relation 1139. Up to 211 conditions per place. [2021-10-15 19:48:51,841 INFO L132 encePairwiseOnDemand]: 227/254 looper letters, 189 selfloop transitions, 28 changer transitions 0/329 dead transitions. [2021-10-15 19:48:51,842 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 329 transitions, 1556 flow [2021-10-15 19:48:51,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:48:51,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:48:51,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 766 transitions. [2021-10-15 19:48:51,848 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7539370078740157 [2021-10-15 19:48:51,848 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 766 transitions. [2021-10-15 19:48:51,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 766 transitions. [2021-10-15 19:48:51,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:48:51,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 766 transitions. [2021-10-15 19:48:51,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 191.5) internal successors, (766), 4 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:51,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:51,856 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:51,857 INFO L186 Difference]: Start difference. First operand has 207 places, 246 transitions, 872 flow. Second operand 4 states and 766 transitions. [2021-10-15 19:48:51,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 329 transitions, 1556 flow [2021-10-15 19:48:51,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 329 transitions, 1556 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:48:51,870 INFO L242 Difference]: Finished difference. Result has 213 places, 272 transitions, 1128 flow [2021-10-15 19:48:51,871 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=872, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1128, PETRI_PLACES=213, PETRI_TRANSITIONS=272} [2021-10-15 19:48:51,871 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 76 predicate places. [2021-10-15 19:48:51,871 INFO L470 AbstractCegarLoop]: Abstraction has has 213 places, 272 transitions, 1128 flow [2021-10-15 19:48:51,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:51,872 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:48:51,872 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:48:51,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-10-15 19:48:51,872 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:48:51,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:48:51,873 INFO L82 PathProgramCache]: Analyzing trace with hash 311087718, now seen corresponding path program 1 times [2021-10-15 19:48:51,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:48:51,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626364097] [2021-10-15 19:48:51,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:48:51,874 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:48:51,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:48:51,949 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-15 19:48:51,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:48:51,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626364097] [2021-10-15 19:48:51,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626364097] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:48:51,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:48:51,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:48:51,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282434550] [2021-10-15 19:48:51,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:48:51,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:48:51,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:48:51,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:48:51,953 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 254 [2021-10-15 19:48:51,954 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 272 transitions, 1128 flow. Second operand has 4 states, 4 states have (on average 157.25) internal successors, (629), 4 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:51,954 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:48:51,955 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 254 [2021-10-15 19:48:51,955 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:48:54,267 INFO L129 PetriNetUnfolder]: 171/530 cut-off events. [2021-10-15 19:48:54,267 INFO L130 PetriNetUnfolder]: For 713/713 co-relation queries the response was YES. [2021-10-15 19:48:54,270 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1299 conditions, 530 events. 171/530 cut-off events. For 713/713 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1380 event pairs, 1 based on Foata normal form. 0/482 useless extension candidates. Maximal degree in co-relation 1194. Up to 207 conditions per place. [2021-10-15 19:48:54,273 INFO L132 encePairwiseOnDemand]: 231/254 looper letters, 184 selfloop transitions, 24 changer transitions 0/320 dead transitions. [2021-10-15 19:48:54,273 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 320 transitions, 1670 flow [2021-10-15 19:48:54,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:48:54,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:48:54,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 757 transitions. [2021-10-15 19:48:54,276 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7450787401574803 [2021-10-15 19:48:54,276 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 757 transitions. [2021-10-15 19:48:54,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 757 transitions. [2021-10-15 19:48:54,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:48:54,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 757 transitions. [2021-10-15 19:48:54,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 189.25) internal successors, (757), 4 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:54,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:54,282 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:54,282 INFO L186 Difference]: Start difference. First operand has 213 places, 272 transitions, 1128 flow. Second operand 4 states and 757 transitions. [2021-10-15 19:48:54,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 320 transitions, 1670 flow [2021-10-15 19:48:54,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 320 transitions, 1662 flow, removed 4 selfloop flow, removed 0 redundant places. [2021-10-15 19:48:54,297 INFO L242 Difference]: Finished difference. Result has 217 places, 269 transitions, 1152 flow [2021-10-15 19:48:54,298 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1096, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1152, PETRI_PLACES=217, PETRI_TRANSITIONS=269} [2021-10-15 19:48:54,298 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 80 predicate places. [2021-10-15 19:48:54,298 INFO L470 AbstractCegarLoop]: Abstraction has has 217 places, 269 transitions, 1152 flow [2021-10-15 19:48:54,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 157.25) internal successors, (629), 4 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:54,299 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:48:54,299 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:48:54,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-10-15 19:48:54,299 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:48:54,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:48:54,300 INFO L82 PathProgramCache]: Analyzing trace with hash 480988404, now seen corresponding path program 1 times [2021-10-15 19:48:54,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:48:54,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090647996] [2021-10-15 19:48:54,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:48:54,301 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:48:54,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:48:54,369 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-15 19:48:54,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:48:54,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090647996] [2021-10-15 19:48:54,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090647996] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:48:54,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:48:54,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:48:54,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954200610] [2021-10-15 19:48:54,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:48:54,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:48:54,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:48:54,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:48:54,373 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 254 [2021-10-15 19:48:54,374 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 269 transitions, 1152 flow. Second operand has 4 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:54,374 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:48:54,374 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 254 [2021-10-15 19:48:54,374 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:48:55,814 INFO L129 PetriNetUnfolder]: 170/529 cut-off events. [2021-10-15 19:48:55,815 INFO L130 PetriNetUnfolder]: For 805/805 co-relation queries the response was YES. [2021-10-15 19:48:55,818 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1324 conditions, 529 events. 170/529 cut-off events. For 805/805 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1381 event pairs, 1 based on Foata normal form. 0/480 useless extension candidates. Maximal degree in co-relation 1217. Up to 207 conditions per place. [2021-10-15 19:48:55,821 INFO L132 encePairwiseOnDemand]: 231/254 looper letters, 184 selfloop transitions, 24 changer transitions 0/320 dead transitions. [2021-10-15 19:48:55,821 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 320 transitions, 1716 flow [2021-10-15 19:48:55,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:48:55,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:48:55,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 757 transitions. [2021-10-15 19:48:55,825 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7450787401574803 [2021-10-15 19:48:55,825 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 757 transitions. [2021-10-15 19:48:55,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 757 transitions. [2021-10-15 19:48:55,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:48:55,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 757 transitions. [2021-10-15 19:48:55,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 189.25) internal successors, (757), 4 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:55,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:55,832 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:55,832 INFO L186 Difference]: Start difference. First operand has 217 places, 269 transitions, 1152 flow. Second operand 4 states and 757 transitions. [2021-10-15 19:48:55,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 320 transitions, 1716 flow [2021-10-15 19:48:55,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 320 transitions, 1694 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:48:55,881 INFO L242 Difference]: Finished difference. Result has 221 places, 271 transitions, 1214 flow [2021-10-15 19:48:55,882 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1130, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1214, PETRI_PLACES=221, PETRI_TRANSITIONS=271} [2021-10-15 19:48:55,882 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 84 predicate places. [2021-10-15 19:48:55,882 INFO L470 AbstractCegarLoop]: Abstraction has has 221 places, 271 transitions, 1214 flow [2021-10-15 19:48:55,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:55,882 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:48:55,883 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:48:55,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-10-15 19:48:55,883 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:48:55,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:48:55,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1807632351, now seen corresponding path program 1 times [2021-10-15 19:48:55,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:48:55,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613599010] [2021-10-15 19:48:55,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:48:55,888 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:48:55,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:48:55,968 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-15 19:48:55,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:48:55,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613599010] [2021-10-15 19:48:55,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613599010] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:48:55,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:48:55,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:48:55,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725989316] [2021-10-15 19:48:55,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:48:55,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:48:55,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:48:55,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:48:55,972 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 254 [2021-10-15 19:48:55,973 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 271 transitions, 1214 flow. Second operand has 4 states, 4 states have (on average 159.0) internal successors, (636), 4 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:55,974 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:48:55,974 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 254 [2021-10-15 19:48:55,974 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:48:57,294 INFO L129 PetriNetUnfolder]: 166/517 cut-off events. [2021-10-15 19:48:57,295 INFO L130 PetriNetUnfolder]: For 914/914 co-relation queries the response was YES. [2021-10-15 19:48:57,297 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1336 conditions, 517 events. 166/517 cut-off events. For 914/914 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1314 event pairs, 1 based on Foata normal form. 0/471 useless extension candidates. Maximal degree in co-relation 1227. Up to 206 conditions per place. [2021-10-15 19:48:57,301 INFO L132 encePairwiseOnDemand]: 232/254 looper letters, 182 selfloop transitions, 23 changer transitions 0/317 dead transitions. [2021-10-15 19:48:57,301 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 317 transitions, 1752 flow [2021-10-15 19:48:57,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:48:57,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:48:57,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 754 transitions. [2021-10-15 19:48:57,305 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7421259842519685 [2021-10-15 19:48:57,305 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 754 transitions. [2021-10-15 19:48:57,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 754 transitions. [2021-10-15 19:48:57,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:48:57,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 754 transitions. [2021-10-15 19:48:57,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 188.5) internal successors, (754), 4 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:57,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:57,311 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:57,311 INFO L186 Difference]: Start difference. First operand has 221 places, 271 transitions, 1214 flow. Second operand 4 states and 754 transitions. [2021-10-15 19:48:57,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 317 transitions, 1752 flow [2021-10-15 19:48:57,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 317 transitions, 1729 flow, removed 1 selfloop flow, removed 1 redundant places. [2021-10-15 19:48:57,328 INFO L242 Difference]: Finished difference. Result has 224 places, 270 transitions, 1231 flow [2021-10-15 19:48:57,329 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1177, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1231, PETRI_PLACES=224, PETRI_TRANSITIONS=270} [2021-10-15 19:48:57,329 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 87 predicate places. [2021-10-15 19:48:57,329 INFO L470 AbstractCegarLoop]: Abstraction has has 224 places, 270 transitions, 1231 flow [2021-10-15 19:48:57,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 159.0) internal successors, (636), 4 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:57,330 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:48:57,330 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:48:57,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-10-15 19:48:57,331 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:48:57,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:48:57,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1013930581, now seen corresponding path program 1 times [2021-10-15 19:48:57,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:48:57,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870831179] [2021-10-15 19:48:57,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:48:57,332 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:48:57,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:48:57,397 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-15 19:48:57,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:48:57,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870831179] [2021-10-15 19:48:57,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870831179] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:48:57,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:48:57,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:48:57,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352379932] [2021-10-15 19:48:57,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:48:57,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:48:57,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:48:57,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:48:57,401 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 254 [2021-10-15 19:48:57,402 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 270 transitions, 1231 flow. Second operand has 4 states, 4 states have (on average 159.25) internal successors, (637), 4 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:57,402 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:48:57,403 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 254 [2021-10-15 19:48:57,403 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:48:58,352 INFO L129 PetriNetUnfolder]: 165/516 cut-off events. [2021-10-15 19:48:58,352 INFO L130 PetriNetUnfolder]: For 1013/1013 co-relation queries the response was YES. [2021-10-15 19:48:58,355 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1343 conditions, 516 events. 165/516 cut-off events. For 1013/1013 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1322 event pairs, 1 based on Foata normal form. 0/469 useless extension candidates. Maximal degree in co-relation 1234. Up to 232 conditions per place. [2021-10-15 19:48:58,358 INFO L132 encePairwiseOnDemand]: 243/254 looper letters, 174 selfloop transitions, 12 changer transitions 0/298 dead transitions. [2021-10-15 19:48:58,358 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 298 transitions, 1701 flow [2021-10-15 19:48:58,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:48:58,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:48:58,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 720 transitions. [2021-10-15 19:48:58,362 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7086614173228346 [2021-10-15 19:48:58,362 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 720 transitions. [2021-10-15 19:48:58,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 720 transitions. [2021-10-15 19:48:58,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:48:58,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 720 transitions. [2021-10-15 19:48:58,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 180.0) internal successors, (720), 4 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:58,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:58,368 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:58,368 INFO L186 Difference]: Start difference. First operand has 224 places, 270 transitions, 1231 flow. Second operand 4 states and 720 transitions. [2021-10-15 19:48:58,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 298 transitions, 1701 flow [2021-10-15 19:48:58,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 298 transitions, 1680 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:48:58,384 INFO L242 Difference]: Finished difference. Result has 228 places, 272 transitions, 1266 flow [2021-10-15 19:48:58,385 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1210, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1266, PETRI_PLACES=228, PETRI_TRANSITIONS=272} [2021-10-15 19:48:58,385 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 91 predicate places. [2021-10-15 19:48:58,386 INFO L470 AbstractCegarLoop]: Abstraction has has 228 places, 272 transitions, 1266 flow [2021-10-15 19:48:58,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 159.25) internal successors, (637), 4 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:58,386 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:48:58,386 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:48:58,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-10-15 19:48:58,387 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:48:58,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:48:58,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1352764013, now seen corresponding path program 1 times [2021-10-15 19:48:58,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:48:58,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52430306] [2021-10-15 19:48:58,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:48:58,388 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:48:58,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:48:58,473 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-15 19:48:58,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:48:58,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52430306] [2021-10-15 19:48:58,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52430306] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:48:58,473 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:48:58,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:48:58,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308965888] [2021-10-15 19:48:58,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:48:58,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:48:58,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:48:58,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:48:58,477 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 254 [2021-10-15 19:48:58,478 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 272 transitions, 1266 flow. Second operand has 4 states, 4 states have (on average 159.25) internal successors, (637), 4 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:58,478 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:48:58,478 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 254 [2021-10-15 19:48:58,478 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:48:59,569 INFO L129 PetriNetUnfolder]: 164/515 cut-off events. [2021-10-15 19:48:59,569 INFO L130 PetriNetUnfolder]: For 1085/1085 co-relation queries the response was YES. [2021-10-15 19:48:59,571 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1351 conditions, 515 events. 164/515 cut-off events. For 1085/1085 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1298 event pairs, 1 based on Foata normal form. 0/469 useless extension candidates. Maximal degree in co-relation 1242. Up to 206 conditions per place. [2021-10-15 19:48:59,574 INFO L132 encePairwiseOnDemand]: 232/254 looper letters, 184 selfloop transitions, 23 changer transitions 0/319 dead transitions. [2021-10-15 19:48:59,574 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 319 transitions, 1824 flow [2021-10-15 19:48:59,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:48:59,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:48:59,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 754 transitions. [2021-10-15 19:48:59,578 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7421259842519685 [2021-10-15 19:48:59,579 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 754 transitions. [2021-10-15 19:48:59,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 754 transitions. [2021-10-15 19:48:59,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:48:59,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 754 transitions. [2021-10-15 19:48:59,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 188.5) internal successors, (754), 4 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:59,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:59,585 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:59,585 INFO L186 Difference]: Start difference. First operand has 228 places, 272 transitions, 1266 flow. Second operand 4 states and 754 transitions. [2021-10-15 19:48:59,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 319 transitions, 1824 flow [2021-10-15 19:48:59,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 319 transitions, 1806 flow, removed 4 selfloop flow, removed 1 redundant places. [2021-10-15 19:48:59,604 INFO L242 Difference]: Finished difference. Result has 232 places, 274 transitions, 1341 flow [2021-10-15 19:48:59,604 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1248, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1341, PETRI_PLACES=232, PETRI_TRANSITIONS=274} [2021-10-15 19:48:59,605 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 95 predicate places. [2021-10-15 19:48:59,605 INFO L470 AbstractCegarLoop]: Abstraction has has 232 places, 274 transitions, 1341 flow [2021-10-15 19:48:59,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 159.25) internal successors, (637), 4 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:59,606 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:48:59,606 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:48:59,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-10-15 19:48:59,606 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:48:59,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:48:59,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1753876598, now seen corresponding path program 1 times [2021-10-15 19:48:59,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:48:59,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891408901] [2021-10-15 19:48:59,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:48:59,608 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:48:59,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:48:59,678 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-15 19:48:59,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:48:59,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891408901] [2021-10-15 19:48:59,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891408901] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:48:59,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:48:59,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:48:59,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82063664] [2021-10-15 19:48:59,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:48:59,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:48:59,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:48:59,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:48:59,682 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 254 [2021-10-15 19:48:59,683 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 274 transitions, 1341 flow. Second operand has 4 states, 4 states have (on average 159.0) internal successors, (636), 4 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:48:59,683 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:48:59,684 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 254 [2021-10-15 19:48:59,684 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:49:01,438 INFO L129 PetriNetUnfolder]: 163/513 cut-off events. [2021-10-15 19:49:01,438 INFO L130 PetriNetUnfolder]: For 1247/1247 co-relation queries the response was YES. [2021-10-15 19:49:01,440 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1384 conditions, 513 events. 163/513 cut-off events. For 1247/1247 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1299 event pairs, 1 based on Foata normal form. 0/466 useless extension candidates. Maximal degree in co-relation 1270. Up to 232 conditions per place. [2021-10-15 19:49:01,444 INFO L132 encePairwiseOnDemand]: 243/254 looper letters, 175 selfloop transitions, 12 changer transitions 0/299 dead transitions. [2021-10-15 19:49:01,444 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 299 transitions, 1799 flow [2021-10-15 19:49:01,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:49:01,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:49:01,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 719 transitions. [2021-10-15 19:49:01,447 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7076771653543307 [2021-10-15 19:49:01,447 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 719 transitions. [2021-10-15 19:49:01,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 719 transitions. [2021-10-15 19:49:01,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:49:01,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 719 transitions. [2021-10-15 19:49:01,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 179.75) internal successors, (719), 4 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:01,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:01,453 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:01,453 INFO L186 Difference]: Start difference. First operand has 232 places, 274 transitions, 1341 flow. Second operand 4 states and 719 transitions. [2021-10-15 19:49:01,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 299 transitions, 1799 flow [2021-10-15 19:49:01,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 299 transitions, 1766 flow, removed 6 selfloop flow, removed 1 redundant places. [2021-10-15 19:49:01,473 INFO L242 Difference]: Finished difference. Result has 236 places, 276 transitions, 1364 flow [2021-10-15 19:49:01,473 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1308, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1364, PETRI_PLACES=236, PETRI_TRANSITIONS=276} [2021-10-15 19:49:01,474 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 99 predicate places. [2021-10-15 19:49:01,474 INFO L470 AbstractCegarLoop]: Abstraction has has 236 places, 276 transitions, 1364 flow [2021-10-15 19:49:01,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 159.0) internal successors, (636), 4 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:01,474 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:49:01,475 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:49:01,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-10-15 19:49:01,475 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:49:01,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:49:01,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1400788216, now seen corresponding path program 1 times [2021-10-15 19:49:01,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:49:01,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108262882] [2021-10-15 19:49:01,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:49:01,476 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:49:01,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:49:01,541 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-15 19:49:01,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:49:01,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108262882] [2021-10-15 19:49:01,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108262882] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:49:01,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:49:01,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:49:01,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414279930] [2021-10-15 19:49:01,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:49:01,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:49:01,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:49:01,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:49:01,545 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 254 [2021-10-15 19:49:01,546 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 276 transitions, 1364 flow. Second operand has 4 states, 4 states have (on average 159.0) internal successors, (636), 4 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:01,546 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:49:01,547 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 254 [2021-10-15 19:49:01,547 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:49:02,779 INFO L129 PetriNetUnfolder]: 162/511 cut-off events. [2021-10-15 19:49:02,779 INFO L130 PetriNetUnfolder]: For 1323/1323 co-relation queries the response was YES. [2021-10-15 19:49:02,781 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1384 conditions, 511 events. 162/511 cut-off events. For 1323/1323 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1278 event pairs, 1 based on Foata normal form. 0/465 useless extension candidates. Maximal degree in co-relation 1269. Up to 205 conditions per place. [2021-10-15 19:49:02,783 INFO L132 encePairwiseOnDemand]: 232/254 looper letters, 185 selfloop transitions, 23 changer transitions 0/320 dead transitions. [2021-10-15 19:49:02,783 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 320 transitions, 1910 flow [2021-10-15 19:49:02,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:49:02,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:49:02,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 753 transitions. [2021-10-15 19:49:02,785 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7411417322834646 [2021-10-15 19:49:02,786 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 753 transitions. [2021-10-15 19:49:02,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 753 transitions. [2021-10-15 19:49:02,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:49:02,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 753 transitions. [2021-10-15 19:49:02,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 188.25) internal successors, (753), 4 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:02,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:02,791 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:02,791 INFO L186 Difference]: Start difference. First operand has 236 places, 276 transitions, 1364 flow. Second operand 4 states and 753 transitions. [2021-10-15 19:49:02,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 320 transitions, 1910 flow [2021-10-15 19:49:02,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 320 transitions, 1892 flow, removed 4 selfloop flow, removed 1 redundant places. [2021-10-15 19:49:02,811 INFO L242 Difference]: Finished difference. Result has 240 places, 278 transitions, 1439 flow [2021-10-15 19:49:02,812 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1346, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1439, PETRI_PLACES=240, PETRI_TRANSITIONS=278} [2021-10-15 19:49:02,812 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 103 predicate places. [2021-10-15 19:49:02,812 INFO L470 AbstractCegarLoop]: Abstraction has has 240 places, 278 transitions, 1439 flow [2021-10-15 19:49:02,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 159.0) internal successors, (636), 4 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:02,813 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:49:02,813 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:49:02,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-10-15 19:49:02,814 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:49:02,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:49:02,814 INFO L82 PathProgramCache]: Analyzing trace with hash -888297442, now seen corresponding path program 1 times [2021-10-15 19:49:02,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:49:02,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780435252] [2021-10-15 19:49:02,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:49:02,815 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:49:02,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:49:02,901 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-15 19:49:02,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:49:02,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780435252] [2021-10-15 19:49:02,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780435252] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:49:02,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:49:02,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 19:49:02,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190930134] [2021-10-15 19:49:02,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:49:02,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:49:02,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:49:02,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:49:02,905 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 254 [2021-10-15 19:49:02,906 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 278 transitions, 1439 flow. Second operand has 5 states, 5 states have (on average 154.8) internal successors, (774), 5 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:02,906 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:49:02,906 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 254 [2021-10-15 19:49:02,907 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:49:06,773 INFO L129 PetriNetUnfolder]: 167/537 cut-off events. [2021-10-15 19:49:06,773 INFO L130 PetriNetUnfolder]: For 1511/1511 co-relation queries the response was YES. [2021-10-15 19:49:06,777 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1460 conditions, 537 events. 167/537 cut-off events. For 1511/1511 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1446 event pairs, 1 based on Foata normal form. 3/490 useless extension candidates. Maximal degree in co-relation 1342. Up to 245 conditions per place. [2021-10-15 19:49:06,780 INFO L132 encePairwiseOnDemand]: 243/254 looper letters, 155 selfloop transitions, 23 changer transitions 0/289 dead transitions. [2021-10-15 19:49:06,780 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 289 transitions, 1814 flow [2021-10-15 19:49:06,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:49:06,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 19:49:06,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 982 transitions. [2021-10-15 19:49:06,783 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6443569553805775 [2021-10-15 19:49:06,784 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 982 transitions. [2021-10-15 19:49:06,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 982 transitions. [2021-10-15 19:49:06,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:49:06,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 982 transitions. [2021-10-15 19:49:06,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 163.66666666666666) internal successors, (982), 6 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:06,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 254.0) internal successors, (1778), 7 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:06,793 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 254.0) internal successors, (1778), 7 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:06,794 INFO L186 Difference]: Start difference. First operand has 240 places, 278 transitions, 1439 flow. Second operand 6 states and 982 transitions. [2021-10-15 19:49:06,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 289 transitions, 1814 flow [2021-10-15 19:49:06,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 289 transitions, 1782 flow, removed 6 selfloop flow, removed 1 redundant places. [2021-10-15 19:49:06,814 INFO L242 Difference]: Finished difference. Result has 247 places, 281 transitions, 1495 flow [2021-10-15 19:49:06,815 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1380, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1495, PETRI_PLACES=247, PETRI_TRANSITIONS=281} [2021-10-15 19:49:06,817 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 110 predicate places. [2021-10-15 19:49:06,818 INFO L470 AbstractCegarLoop]: Abstraction has has 247 places, 281 transitions, 1495 flow [2021-10-15 19:49:06,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 154.8) internal successors, (774), 5 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:06,818 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:49:06,819 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:49:06,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-10-15 19:49:06,819 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:49:06,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:49:06,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1464539597, now seen corresponding path program 1 times [2021-10-15 19:49:06,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:49:06,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403134385] [2021-10-15 19:49:06,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:49:06,821 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:49:06,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:49:06,912 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-15 19:49:06,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:49:06,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403134385] [2021-10-15 19:49:06,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403134385] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:49:06,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:49:06,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:49:06,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650212789] [2021-10-15 19:49:06,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:49:06,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:49:06,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:49:06,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:49:06,919 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 254 [2021-10-15 19:49:06,920 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 281 transitions, 1495 flow. Second operand has 4 states, 4 states have (on average 159.5) internal successors, (638), 4 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:06,920 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:49:06,920 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 254 [2021-10-15 19:49:06,921 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:49:08,171 INFO L129 PetriNetUnfolder]: 166/534 cut-off events. [2021-10-15 19:49:08,171 INFO L130 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2021-10-15 19:49:08,173 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1476 conditions, 534 events. 166/534 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1428 event pairs, 1 based on Foata normal form. 0/483 useless extension candidates. Maximal degree in co-relation 1379. Up to 215 conditions per place. [2021-10-15 19:49:08,176 INFO L132 encePairwiseOnDemand]: 234/254 looper letters, 187 selfloop transitions, 21 changer transitions 0/321 dead transitions. [2021-10-15 19:49:08,176 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 321 transitions, 2011 flow [2021-10-15 19:49:08,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:49:08,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:49:08,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 750 transitions. [2021-10-15 19:49:08,178 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7381889763779528 [2021-10-15 19:49:08,178 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 750 transitions. [2021-10-15 19:49:08,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 750 transitions. [2021-10-15 19:49:08,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:49:08,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 750 transitions. [2021-10-15 19:49:08,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 187.5) internal successors, (750), 4 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:08,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:08,183 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:08,183 INFO L186 Difference]: Start difference. First operand has 247 places, 281 transitions, 1495 flow. Second operand 4 states and 750 transitions. [2021-10-15 19:49:08,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 321 transitions, 2011 flow [2021-10-15 19:49:08,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 321 transitions, 1964 flow, removed 17 selfloop flow, removed 1 redundant places. [2021-10-15 19:49:08,205 INFO L242 Difference]: Finished difference. Result has 250 places, 281 transitions, 1486 flow [2021-10-15 19:49:08,205 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1432, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1486, PETRI_PLACES=250, PETRI_TRANSITIONS=281} [2021-10-15 19:49:08,205 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 113 predicate places. [2021-10-15 19:49:08,206 INFO L470 AbstractCegarLoop]: Abstraction has has 250 places, 281 transitions, 1486 flow [2021-10-15 19:49:08,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 159.5) internal successors, (638), 4 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:08,206 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:49:08,206 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:49:08,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-10-15 19:49:08,207 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:49:08,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:49:08,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1277482507, now seen corresponding path program 1 times [2021-10-15 19:49:08,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:49:08,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868715961] [2021-10-15 19:49:08,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:49:08,208 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:49:08,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:49:08,267 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-15 19:49:08,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:49:08,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868715961] [2021-10-15 19:49:08,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868715961] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:49:08,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:49:08,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:49:08,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689115686] [2021-10-15 19:49:08,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:49:08,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:49:08,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:49:08,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:49:08,272 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 254 [2021-10-15 19:49:08,272 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 281 transitions, 1486 flow. Second operand has 4 states, 4 states have (on average 159.5) internal successors, (638), 4 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:08,273 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:49:08,273 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 254 [2021-10-15 19:49:08,273 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:49:09,315 INFO L129 PetriNetUnfolder]: 165/532 cut-off events. [2021-10-15 19:49:09,316 INFO L130 PetriNetUnfolder]: For 1648/1648 co-relation queries the response was YES. [2021-10-15 19:49:09,319 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1472 conditions, 532 events. 165/532 cut-off events. For 1648/1648 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1421 event pairs, 1 based on Foata normal form. 1/484 useless extension candidates. Maximal degree in co-relation 1374. Up to 238 conditions per place. [2021-10-15 19:49:09,322 INFO L132 encePairwiseOnDemand]: 245/254 looper letters, 180 selfloop transitions, 10 changer transitions 0/303 dead transitions. [2021-10-15 19:49:09,322 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 303 transitions, 1934 flow [2021-10-15 19:49:09,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:49:09,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:49:09,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 717 transitions. [2021-10-15 19:49:09,325 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7057086614173228 [2021-10-15 19:49:09,325 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 717 transitions. [2021-10-15 19:49:09,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 717 transitions. [2021-10-15 19:49:09,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:49:09,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 717 transitions. [2021-10-15 19:49:09,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 179.25) internal successors, (717), 4 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:09,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:09,330 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:09,330 INFO L186 Difference]: Start difference. First operand has 250 places, 281 transitions, 1486 flow. Second operand 4 states and 717 transitions. [2021-10-15 19:49:09,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 303 transitions, 1934 flow [2021-10-15 19:49:09,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 303 transitions, 1907 flow, removed 4 selfloop flow, removed 1 redundant places. [2021-10-15 19:49:09,350 INFO L242 Difference]: Finished difference. Result has 254 places, 282 transitions, 1501 flow [2021-10-15 19:49:09,351 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1449, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1501, PETRI_PLACES=254, PETRI_TRANSITIONS=282} [2021-10-15 19:49:09,351 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 117 predicate places. [2021-10-15 19:49:09,351 INFO L470 AbstractCegarLoop]: Abstraction has has 254 places, 282 transitions, 1501 flow [2021-10-15 19:49:09,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 159.5) internal successors, (638), 4 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:09,352 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:49:09,352 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:49:09,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-10-15 19:49:09,352 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:49:09,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:49:09,353 INFO L82 PathProgramCache]: Analyzing trace with hash -924394125, now seen corresponding path program 1 times [2021-10-15 19:49:09,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:49:09,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846150179] [2021-10-15 19:49:09,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:49:09,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:49:09,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:49:09,411 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-15 19:49:09,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:49:09,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846150179] [2021-10-15 19:49:09,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846150179] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:49:09,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:49:09,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:49:09,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129044920] [2021-10-15 19:49:09,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:49:09,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:49:09,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:49:09,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:49:09,415 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 254 [2021-10-15 19:49:09,416 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 282 transitions, 1501 flow. Second operand has 4 states, 4 states have (on average 159.5) internal successors, (638), 4 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:09,416 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:49:09,416 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 254 [2021-10-15 19:49:09,416 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:49:11,815 INFO L129 PetriNetUnfolder]: 164/530 cut-off events. [2021-10-15 19:49:11,815 INFO L130 PetriNetUnfolder]: For 1703/1703 co-relation queries the response was YES. [2021-10-15 19:49:11,818 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1466 conditions, 530 events. 164/530 cut-off events. For 1703/1703 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1405 event pairs, 1 based on Foata normal form. 1/482 useless extension candidates. Maximal degree in co-relation 1365. Up to 212 conditions per place. [2021-10-15 19:49:11,822 INFO L132 encePairwiseOnDemand]: 235/254 looper letters, 188 selfloop transitions, 20 changer transitions 0/321 dead transitions. [2021-10-15 19:49:11,822 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 321 transitions, 2014 flow [2021-10-15 19:49:11,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:49:11,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:49:11,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 749 transitions. [2021-10-15 19:49:11,825 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7372047244094488 [2021-10-15 19:49:11,825 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 749 transitions. [2021-10-15 19:49:11,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 749 transitions. [2021-10-15 19:49:11,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:49:11,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 749 transitions. [2021-10-15 19:49:11,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 187.25) internal successors, (749), 4 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:11,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:11,830 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:11,830 INFO L186 Difference]: Start difference. First operand has 254 places, 282 transitions, 1501 flow. Second operand 4 states and 749 transitions. [2021-10-15 19:49:11,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 321 transitions, 2014 flow [2021-10-15 19:49:11,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 321 transitions, 1998 flow, removed 4 selfloop flow, removed 1 redundant places. [2021-10-15 19:49:11,853 INFO L242 Difference]: Finished difference. Result has 257 places, 282 transitions, 1524 flow [2021-10-15 19:49:11,853 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1470, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1524, PETRI_PLACES=257, PETRI_TRANSITIONS=282} [2021-10-15 19:49:11,853 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 120 predicate places. [2021-10-15 19:49:11,854 INFO L470 AbstractCegarLoop]: Abstraction has has 257 places, 282 transitions, 1524 flow [2021-10-15 19:49:11,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 159.5) internal successors, (638), 4 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:11,854 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:49:11,854 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:49:11,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-10-15 19:49:11,855 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:49:11,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:49:11,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1817627979, now seen corresponding path program 1 times [2021-10-15 19:49:11,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:49:11,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147712727] [2021-10-15 19:49:11,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:49:11,856 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:49:11,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:49:11,933 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-15 19:49:11,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:49:11,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147712727] [2021-10-15 19:49:11,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147712727] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:49:11,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:49:11,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:49:11,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705288100] [2021-10-15 19:49:11,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:49:11,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:49:11,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:49:11,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:49:11,938 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 254 [2021-10-15 19:49:11,938 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 282 transitions, 1524 flow. Second operand has 4 states, 4 states have (on average 159.5) internal successors, (638), 4 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:11,938 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:49:11,939 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 254 [2021-10-15 19:49:11,939 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:49:14,275 INFO L129 PetriNetUnfolder]: 163/527 cut-off events. [2021-10-15 19:49:14,275 INFO L130 PetriNetUnfolder]: For 1826/1826 co-relation queries the response was YES. [2021-10-15 19:49:14,277 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1467 conditions, 527 events. 163/527 cut-off events. For 1826/1826 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1395 event pairs, 1 based on Foata normal form. 1/479 useless extension candidates. Maximal degree in co-relation 1338. Up to 235 conditions per place. [2021-10-15 19:49:14,281 INFO L132 encePairwiseOnDemand]: 246/254 looper letters, 179 selfloop transitions, 9 changer transitions 0/301 dead transitions. [2021-10-15 19:49:14,281 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 301 transitions, 1950 flow [2021-10-15 19:49:14,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:49:14,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:49:14,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 715 transitions. [2021-10-15 19:49:14,289 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7037401574803149 [2021-10-15 19:49:14,289 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 715 transitions. [2021-10-15 19:49:14,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 715 transitions. [2021-10-15 19:49:14,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:49:14,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 715 transitions. [2021-10-15 19:49:14,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 178.75) internal successors, (715), 4 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:14,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:14,294 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:14,294 INFO L186 Difference]: Start difference. First operand has 257 places, 282 transitions, 1524 flow. Second operand 4 states and 715 transitions. [2021-10-15 19:49:14,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 301 transitions, 1950 flow [2021-10-15 19:49:14,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 301 transitions, 1916 flow, removed 8 selfloop flow, removed 1 redundant places. [2021-10-15 19:49:14,316 INFO L242 Difference]: Finished difference. Result has 260 places, 281 transitions, 1500 flow [2021-10-15 19:49:14,316 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1478, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1500, PETRI_PLACES=260, PETRI_TRANSITIONS=281} [2021-10-15 19:49:14,317 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 123 predicate places. [2021-10-15 19:49:14,317 INFO L470 AbstractCegarLoop]: Abstraction has has 260 places, 281 transitions, 1500 flow [2021-10-15 19:49:14,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 159.5) internal successors, (638), 4 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:14,317 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:49:14,318 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:49:14,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-10-15 19:49:14,318 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:49:14,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:49:14,319 INFO L82 PathProgramCache]: Analyzing trace with hash 31891465, now seen corresponding path program 1 times [2021-10-15 19:49:14,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:49:14,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2414732] [2021-10-15 19:49:14,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:49:14,319 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:49:14,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:49:14,381 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-15 19:49:14,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:49:14,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2414732] [2021-10-15 19:49:14,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2414732] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:49:14,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:49:14,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:49:14,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533375154] [2021-10-15 19:49:14,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:49:14,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:49:14,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:49:14,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:49:14,385 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 254 [2021-10-15 19:49:14,385 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 281 transitions, 1500 flow. Second operand has 4 states, 4 states have (on average 159.0) internal successors, (636), 4 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:14,385 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:49:14,386 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 254 [2021-10-15 19:49:14,386 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:49:16,834 INFO L129 PetriNetUnfolder]: 162/526 cut-off events. [2021-10-15 19:49:16,834 INFO L130 PetriNetUnfolder]: For 1824/1824 co-relation queries the response was YES. [2021-10-15 19:49:16,836 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1454 conditions, 526 events. 162/526 cut-off events. For 1824/1824 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1387 event pairs, 1 based on Foata normal form. 0/475 useless extension candidates. Maximal degree in co-relation 1324. Up to 211 conditions per place. [2021-10-15 19:49:16,839 INFO L132 encePairwiseOnDemand]: 235/254 looper letters, 187 selfloop transitions, 20 changer transitions 0/320 dead transitions. [2021-10-15 19:49:16,839 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 320 transitions, 2018 flow [2021-10-15 19:49:16,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:49:16,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:49:16,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 749 transitions. [2021-10-15 19:49:16,841 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7372047244094488 [2021-10-15 19:49:16,841 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 749 transitions. [2021-10-15 19:49:16,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 749 transitions. [2021-10-15 19:49:16,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:49:16,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 749 transitions. [2021-10-15 19:49:16,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 187.25) internal successors, (749), 4 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:16,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:16,846 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:16,846 INFO L186 Difference]: Start difference. First operand has 260 places, 281 transitions, 1500 flow. Second operand 4 states and 749 transitions. [2021-10-15 19:49:16,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 320 transitions, 2018 flow [2021-10-15 19:49:16,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 320 transitions, 2011 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:49:16,868 INFO L242 Difference]: Finished difference. Result has 263 places, 282 transitions, 1545 flow [2021-10-15 19:49:16,869 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1493, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1545, PETRI_PLACES=263, PETRI_TRANSITIONS=282} [2021-10-15 19:49:16,869 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 126 predicate places. [2021-10-15 19:49:16,869 INFO L470 AbstractCegarLoop]: Abstraction has has 263 places, 282 transitions, 1545 flow [2021-10-15 19:49:16,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 159.0) internal successors, (636), 4 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:16,870 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:49:16,870 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:49:16,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-10-15 19:49:16,870 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:49:16,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:49:16,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1971053511, now seen corresponding path program 1 times [2021-10-15 19:49:16,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:49:16,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285638374] [2021-10-15 19:49:16,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:49:16,872 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:49:16,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:49:16,932 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-15 19:49:16,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:49:16,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285638374] [2021-10-15 19:49:16,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285638374] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:49:16,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:49:16,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:49:16,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621608518] [2021-10-15 19:49:16,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:49:16,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:49:16,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:49:16,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:49:16,936 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 254 [2021-10-15 19:49:16,937 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 282 transitions, 1545 flow. Second operand has 4 states, 4 states have (on average 159.0) internal successors, (636), 4 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:16,937 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:49:16,937 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 254 [2021-10-15 19:49:16,937 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:49:19,141 INFO L129 PetriNetUnfolder]: 161/525 cut-off events. [2021-10-15 19:49:19,141 INFO L130 PetriNetUnfolder]: For 1991/1991 co-relation queries the response was YES. [2021-10-15 19:49:19,143 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1471 conditions, 525 events. 161/525 cut-off events. For 1991/1991 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1378 event pairs, 1 based on Foata normal form. 0/475 useless extension candidates. Maximal degree in co-relation 1340. Up to 235 conditions per place. [2021-10-15 19:49:19,145 INFO L132 encePairwiseOnDemand]: 246/254 looper letters, 180 selfloop transitions, 9 changer transitions 0/302 dead transitions. [2021-10-15 19:49:19,146 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 302 transitions, 1987 flow [2021-10-15 19:49:19,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:49:19,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:49:19,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 715 transitions. [2021-10-15 19:49:19,147 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7037401574803149 [2021-10-15 19:49:19,147 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 715 transitions. [2021-10-15 19:49:19,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 715 transitions. [2021-10-15 19:49:19,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:49:19,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 715 transitions. [2021-10-15 19:49:19,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 178.75) internal successors, (715), 4 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:19,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:19,151 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:19,151 INFO L186 Difference]: Start difference. First operand has 263 places, 282 transitions, 1545 flow. Second operand 4 states and 715 transitions. [2021-10-15 19:49:19,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 302 transitions, 1987 flow [2021-10-15 19:49:19,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 302 transitions, 1965 flow, removed 2 selfloop flow, removed 1 redundant places. [2021-10-15 19:49:19,174 INFO L242 Difference]: Finished difference. Result has 266 places, 283 transitions, 1555 flow [2021-10-15 19:49:19,174 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1523, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1555, PETRI_PLACES=266, PETRI_TRANSITIONS=283} [2021-10-15 19:49:19,175 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 129 predicate places. [2021-10-15 19:49:19,175 INFO L470 AbstractCegarLoop]: Abstraction has has 266 places, 283 transitions, 1555 flow [2021-10-15 19:49:19,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 159.0) internal successors, (636), 4 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:19,175 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:49:19,175 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:49:19,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-10-15 19:49:19,176 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:49:19,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:49:19,176 INFO L82 PathProgramCache]: Analyzing trace with hash 661455759, now seen corresponding path program 1 times [2021-10-15 19:49:19,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:49:19,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780969248] [2021-10-15 19:49:19,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:49:19,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:49:19,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:49:19,247 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-15 19:49:19,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:49:19,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780969248] [2021-10-15 19:49:19,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780969248] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:49:19,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:49:19,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:49:19,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226453704] [2021-10-15 19:49:19,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:49:19,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:49:19,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:49:19,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:49:19,251 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 254 [2021-10-15 19:49:19,252 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 283 transitions, 1555 flow. Second operand has 4 states, 4 states have (on average 159.25) internal successors, (637), 4 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:19,252 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:49:19,252 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 254 [2021-10-15 19:49:19,252 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:49:21,043 INFO L129 PetriNetUnfolder]: 160/524 cut-off events. [2021-10-15 19:49:21,044 INFO L130 PetriNetUnfolder]: For 2044/2044 co-relation queries the response was YES. [2021-10-15 19:49:21,046 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1466 conditions, 524 events. 160/524 cut-off events. For 2044/2044 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1367 event pairs, 1 based on Foata normal form. 0/473 useless extension candidates. Maximal degree in co-relation 1334. Up to 211 conditions per place. [2021-10-15 19:49:21,048 INFO L132 encePairwiseOnDemand]: 235/254 looper letters, 188 selfloop transitions, 20 changer transitions 0/321 dead transitions. [2021-10-15 19:49:21,048 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 321 transitions, 2069 flow [2021-10-15 19:49:21,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:49:21,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:49:21,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 749 transitions. [2021-10-15 19:49:21,049 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7372047244094488 [2021-10-15 19:49:21,050 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 749 transitions. [2021-10-15 19:49:21,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 749 transitions. [2021-10-15 19:49:21,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:49:21,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 749 transitions. [2021-10-15 19:49:21,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 187.25) internal successors, (749), 4 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:21,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:21,054 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:21,054 INFO L186 Difference]: Start difference. First operand has 266 places, 283 transitions, 1555 flow. Second operand 4 states and 749 transitions. [2021-10-15 19:49:21,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 321 transitions, 2069 flow [2021-10-15 19:49:21,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 321 transitions, 2056 flow, removed 3 selfloop flow, removed 1 redundant places. [2021-10-15 19:49:21,080 INFO L242 Difference]: Finished difference. Result has 269 places, 284 transitions, 1594 flow [2021-10-15 19:49:21,080 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1542, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1594, PETRI_PLACES=269, PETRI_TRANSITIONS=284} [2021-10-15 19:49:21,081 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 132 predicate places. [2021-10-15 19:49:21,081 INFO L470 AbstractCegarLoop]: Abstraction has has 269 places, 284 transitions, 1594 flow [2021-10-15 19:49:21,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 159.25) internal successors, (637), 4 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:21,081 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:49:21,081 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:49:21,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-10-15 19:49:21,082 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:49:21,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:49:21,082 INFO L82 PathProgramCache]: Analyzing trace with hash 645937041, now seen corresponding path program 1 times [2021-10-15 19:49:21,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:49:21,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875047816] [2021-10-15 19:49:21,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:49:21,083 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:49:21,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:49:21,141 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-15 19:49:21,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:49:21,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875047816] [2021-10-15 19:49:21,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875047816] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:49:21,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:49:21,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:49:21,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178998829] [2021-10-15 19:49:21,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:49:21,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:49:21,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:49:21,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:49:21,145 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 254 [2021-10-15 19:49:21,145 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 284 transitions, 1594 flow. Second operand has 4 states, 4 states have (on average 159.25) internal successors, (637), 4 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:21,146 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:49:21,146 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 254 [2021-10-15 19:49:21,146 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:49:22,936 INFO L129 PetriNetUnfolder]: 159/523 cut-off events. [2021-10-15 19:49:22,936 INFO L130 PetriNetUnfolder]: For 2222/2222 co-relation queries the response was YES. [2021-10-15 19:49:22,939 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1480 conditions, 523 events. 159/523 cut-off events. For 2222/2222 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1371 event pairs, 1 based on Foata normal form. 0/473 useless extension candidates. Maximal degree in co-relation 1347. Up to 235 conditions per place. [2021-10-15 19:49:22,941 INFO L132 encePairwiseOnDemand]: 246/254 looper letters, 181 selfloop transitions, 9 changer transitions 0/303 dead transitions. [2021-10-15 19:49:22,941 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 303 transitions, 2032 flow [2021-10-15 19:49:22,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:49:22,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:49:22,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 715 transitions. [2021-10-15 19:49:22,942 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7037401574803149 [2021-10-15 19:49:22,942 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 715 transitions. [2021-10-15 19:49:22,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 715 transitions. [2021-10-15 19:49:22,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:49:22,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 715 transitions. [2021-10-15 19:49:22,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 178.75) internal successors, (715), 4 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:22,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:22,946 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:22,947 INFO L186 Difference]: Start difference. First operand has 269 places, 284 transitions, 1594 flow. Second operand 4 states and 715 transitions. [2021-10-15 19:49:22,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 303 transitions, 2032 flow [2021-10-15 19:49:22,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 303 transitions, 2010 flow, removed 2 selfloop flow, removed 1 redundant places. [2021-10-15 19:49:22,966 INFO L242 Difference]: Finished difference. Result has 272 places, 285 transitions, 1604 flow [2021-10-15 19:49:22,967 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1572, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1604, PETRI_PLACES=272, PETRI_TRANSITIONS=285} [2021-10-15 19:49:22,967 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 135 predicate places. [2021-10-15 19:49:22,967 INFO L470 AbstractCegarLoop]: Abstraction has has 272 places, 285 transitions, 1604 flow [2021-10-15 19:49:22,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 159.25) internal successors, (637), 4 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:22,968 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:49:22,968 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:49:22,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-10-15 19:49:22,968 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:49:22,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:49:22,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1716045092, now seen corresponding path program 1 times [2021-10-15 19:49:22,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:49:22,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428000618] [2021-10-15 19:49:22,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:49:22,969 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:49:22,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:49:23,031 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-15 19:49:23,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:49:23,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428000618] [2021-10-15 19:49:23,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428000618] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:49:23,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:49:23,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:49:23,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285396749] [2021-10-15 19:49:23,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:49:23,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:49:23,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:49:23,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:49:23,035 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 254 [2021-10-15 19:49:23,036 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 285 transitions, 1604 flow. Second operand has 4 states, 4 states have (on average 159.5) internal successors, (638), 4 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:23,036 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:49:23,036 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 254 [2021-10-15 19:49:23,036 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:49:24,570 INFO L129 PetriNetUnfolder]: 158/522 cut-off events. [2021-10-15 19:49:24,570 INFO L130 PetriNetUnfolder]: For 2280/2280 co-relation queries the response was YES. [2021-10-15 19:49:24,572 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1475 conditions, 522 events. 158/522 cut-off events. For 2280/2280 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1364 event pairs, 1 based on Foata normal form. 0/471 useless extension candidates. Maximal degree in co-relation 1338. Up to 211 conditions per place. [2021-10-15 19:49:24,574 INFO L132 encePairwiseOnDemand]: 235/254 looper letters, 189 selfloop transitions, 20 changer transitions 0/322 dead transitions. [2021-10-15 19:49:24,575 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 322 transitions, 2114 flow [2021-10-15 19:49:24,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:49:24,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:49:24,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 749 transitions. [2021-10-15 19:49:24,576 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7372047244094488 [2021-10-15 19:49:24,576 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 749 transitions. [2021-10-15 19:49:24,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 749 transitions. [2021-10-15 19:49:24,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:49:24,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 749 transitions. [2021-10-15 19:49:24,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 187.25) internal successors, (749), 4 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:24,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:24,603 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:24,603 INFO L186 Difference]: Start difference. First operand has 272 places, 285 transitions, 1604 flow. Second operand 4 states and 749 transitions. [2021-10-15 19:49:24,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 322 transitions, 2114 flow [2021-10-15 19:49:24,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 322 transitions, 2101 flow, removed 3 selfloop flow, removed 1 redundant places. [2021-10-15 19:49:24,627 INFO L242 Difference]: Finished difference. Result has 275 places, 286 transitions, 1643 flow [2021-10-15 19:49:24,627 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1591, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1643, PETRI_PLACES=275, PETRI_TRANSITIONS=286} [2021-10-15 19:49:24,627 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 138 predicate places. [2021-10-15 19:49:24,628 INFO L470 AbstractCegarLoop]: Abstraction has has 275 places, 286 transitions, 1643 flow [2021-10-15 19:49:24,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 159.5) internal successors, (638), 4 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:24,628 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:49:24,628 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:49:24,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-10-15 19:49:24,629 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:49:24,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:49:24,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1234964834, now seen corresponding path program 1 times [2021-10-15 19:49:24,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:49:24,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429785712] [2021-10-15 19:49:24,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:49:24,630 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:49:24,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:49:24,689 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-15 19:49:24,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:49:24,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429785712] [2021-10-15 19:49:24,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429785712] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:49:24,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:49:24,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:49:24,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73127904] [2021-10-15 19:49:24,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:49:24,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:49:24,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:49:24,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:49:24,692 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 254 [2021-10-15 19:49:24,693 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 286 transitions, 1643 flow. Second operand has 4 states, 4 states have (on average 159.5) internal successors, (638), 4 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:24,693 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:49:24,693 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 254 [2021-10-15 19:49:24,694 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:49:26,314 INFO L129 PetriNetUnfolder]: 157/521 cut-off events. [2021-10-15 19:49:26,314 INFO L130 PetriNetUnfolder]: For 2472/2472 co-relation queries the response was YES. [2021-10-15 19:49:26,318 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1489 conditions, 521 events. 157/521 cut-off events. For 2472/2472 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1342 event pairs, 1 based on Foata normal form. 0/471 useless extension candidates. Maximal degree in co-relation 1349. Up to 235 conditions per place. [2021-10-15 19:49:26,322 INFO L132 encePairwiseOnDemand]: 246/254 looper letters, 182 selfloop transitions, 9 changer transitions 0/304 dead transitions. [2021-10-15 19:49:26,322 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 304 transitions, 2077 flow [2021-10-15 19:49:26,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:49:26,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:49:26,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 715 transitions. [2021-10-15 19:49:26,324 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7037401574803149 [2021-10-15 19:49:26,324 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 715 transitions. [2021-10-15 19:49:26,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 715 transitions. [2021-10-15 19:49:26,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:49:26,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 715 transitions. [2021-10-15 19:49:26,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 178.75) internal successors, (715), 4 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:26,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:26,328 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:26,329 INFO L186 Difference]: Start difference. First operand has 275 places, 286 transitions, 1643 flow. Second operand 4 states and 715 transitions. [2021-10-15 19:49:26,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 304 transitions, 2077 flow [2021-10-15 19:49:26,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 304 transitions, 2055 flow, removed 2 selfloop flow, removed 1 redundant places. [2021-10-15 19:49:26,353 INFO L242 Difference]: Finished difference. Result has 278 places, 287 transitions, 1653 flow [2021-10-15 19:49:26,354 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1621, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1653, PETRI_PLACES=278, PETRI_TRANSITIONS=287} [2021-10-15 19:49:26,354 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 141 predicate places. [2021-10-15 19:49:26,354 INFO L470 AbstractCegarLoop]: Abstraction has has 278 places, 287 transitions, 1653 flow [2021-10-15 19:49:26,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 159.5) internal successors, (638), 4 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:26,355 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:49:26,355 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:49:26,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-10-15 19:49:26,355 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:49:26,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:49:26,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1233458550, now seen corresponding path program 1 times [2021-10-15 19:49:26,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:49:26,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055505639] [2021-10-15 19:49:26,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:49:26,356 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:49:26,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:49:26,422 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-15 19:49:26,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:49:26,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055505639] [2021-10-15 19:49:26,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055505639] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:49:26,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:49:26,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:49:26,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676493395] [2021-10-15 19:49:26,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:49:26,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:49:26,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:49:26,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:49:26,426 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 254 [2021-10-15 19:49:26,426 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 287 transitions, 1653 flow. Second operand has 4 states, 4 states have (on average 159.75) internal successors, (639), 4 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:26,427 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:49:26,427 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 254 [2021-10-15 19:49:26,427 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:49:27,460 INFO L129 PetriNetUnfolder]: 154/508 cut-off events. [2021-10-15 19:49:27,460 INFO L130 PetriNetUnfolder]: For 2444/2444 co-relation queries the response was YES. [2021-10-15 19:49:27,463 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1456 conditions, 508 events. 154/508 cut-off events. For 2444/2444 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1266 event pairs, 1 based on Foata normal form. 1/462 useless extension candidates. Maximal degree in co-relation 1317. Up to 210 conditions per place. [2021-10-15 19:49:27,466 INFO L132 encePairwiseOnDemand]: 236/254 looper letters, 185 selfloop transitions, 19 changer transitions 0/317 dead transitions. [2021-10-15 19:49:27,466 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 317 transitions, 2112 flow [2021-10-15 19:49:27,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:49:27,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:49:27,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 743 transitions. [2021-10-15 19:49:27,467 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7312992125984252 [2021-10-15 19:49:27,467 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 743 transitions. [2021-10-15 19:49:27,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 743 transitions. [2021-10-15 19:49:27,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:49:27,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 743 transitions. [2021-10-15 19:49:27,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 185.75) internal successors, (743), 4 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:27,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:27,469 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:27,470 INFO L186 Difference]: Start difference. First operand has 278 places, 287 transitions, 1653 flow. Second operand 4 states and 743 transitions. [2021-10-15 19:49:27,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 317 transitions, 2112 flow [2021-10-15 19:49:27,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 317 transitions, 2097 flow, removed 4 selfloop flow, removed 1 redundant places. [2021-10-15 19:49:27,491 INFO L242 Difference]: Finished difference. Result has 281 places, 286 transitions, 1659 flow [2021-10-15 19:49:27,492 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1617, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1659, PETRI_PLACES=281, PETRI_TRANSITIONS=286} [2021-10-15 19:49:27,492 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 144 predicate places. [2021-10-15 19:49:27,492 INFO L470 AbstractCegarLoop]: Abstraction has has 281 places, 286 transitions, 1659 flow [2021-10-15 19:49:27,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 159.75) internal successors, (639), 4 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:27,493 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:49:27,493 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:49:27,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-10-15 19:49:27,493 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:49:27,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:49:27,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1032922636, now seen corresponding path program 1 times [2021-10-15 19:49:27,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:49:27,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623969178] [2021-10-15 19:49:27,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:49:27,495 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:49:27,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:49:27,561 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-15 19:49:27,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:49:27,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623969178] [2021-10-15 19:49:27,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623969178] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:49:27,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:49:27,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:49:27,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142468350] [2021-10-15 19:49:27,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:49:27,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:49:27,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:49:27,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:49:27,564 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 254 [2021-10-15 19:49:27,565 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 286 transitions, 1659 flow. Second operand has 4 states, 4 states have (on average 159.75) internal successors, (639), 4 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:27,565 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:49:27,566 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 254 [2021-10-15 19:49:27,566 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:49:29,582 INFO L129 PetriNetUnfolder]: 151/495 cut-off events. [2021-10-15 19:49:29,582 INFO L130 PetriNetUnfolder]: For 2584/2584 co-relation queries the response was YES. [2021-10-15 19:49:29,586 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1439 conditions, 495 events. 151/495 cut-off events. For 2584/2584 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1164 event pairs, 1 based on Foata normal form. 1/451 useless extension candidates. Maximal degree in co-relation 1360. Up to 228 conditions per place. [2021-10-15 19:49:29,589 INFO L132 encePairwiseOnDemand]: 247/254 looper letters, 176 selfloop transitions, 8 changer transitions 0/297 dead transitions. [2021-10-15 19:49:29,589 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 297 transitions, 2041 flow [2021-10-15 19:49:29,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:49:29,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:49:29,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 709 transitions. [2021-10-15 19:49:29,591 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6978346456692913 [2021-10-15 19:49:29,591 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 709 transitions. [2021-10-15 19:49:29,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 709 transitions. [2021-10-15 19:49:29,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:49:29,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 709 transitions. [2021-10-15 19:49:29,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 177.25) internal successors, (709), 4 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:29,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:29,595 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:29,595 INFO L186 Difference]: Start difference. First operand has 281 places, 286 transitions, 1659 flow. Second operand 4 states and 709 transitions. [2021-10-15 19:49:29,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 297 transitions, 2041 flow [2021-10-15 19:49:29,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 297 transitions, 2022 flow, removed 1 selfloop flow, removed 1 redundant places. [2021-10-15 19:49:29,614 INFO L242 Difference]: Finished difference. Result has 284 places, 285 transitions, 1644 flow [2021-10-15 19:49:29,615 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1624, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1644, PETRI_PLACES=284, PETRI_TRANSITIONS=285} [2021-10-15 19:49:29,615 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 147 predicate places. [2021-10-15 19:49:29,615 INFO L470 AbstractCegarLoop]: Abstraction has has 284 places, 285 transitions, 1644 flow [2021-10-15 19:49:29,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 159.75) internal successors, (639), 4 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:29,615 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:49:29,616 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:49:29,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-10-15 19:49:29,616 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:49:29,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:49:29,617 INFO L82 PathProgramCache]: Analyzing trace with hash 688997456, now seen corresponding path program 1 times [2021-10-15 19:49:29,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:49:29,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055401687] [2021-10-15 19:49:29,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:49:29,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:49:29,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:49:29,691 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-15 19:49:29,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:49:29,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055401687] [2021-10-15 19:49:29,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055401687] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:49:29,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:49:29,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:49:29,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281564466] [2021-10-15 19:49:29,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:49:29,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:49:29,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:49:29,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:49:29,695 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 254 [2021-10-15 19:49:29,696 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 285 transitions, 1644 flow. Second operand has 4 states, 4 states have (on average 161.25) internal successors, (645), 4 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:29,696 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:49:29,696 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 254 [2021-10-15 19:49:29,696 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:49:31,525 INFO L129 PetriNetUnfolder]: 150/494 cut-off events. [2021-10-15 19:49:31,526 INFO L130 PetriNetUnfolder]: For 2635/2635 co-relation queries the response was YES. [2021-10-15 19:49:31,528 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1435 conditions, 494 events. 150/494 cut-off events. For 2635/2635 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1150 event pairs, 1 based on Foata normal form. 0/448 useless extension candidates. Maximal degree in co-relation 1356. Up to 204 conditions per place. [2021-10-15 19:49:31,530 INFO L132 encePairwiseOnDemand]: 236/254 looper letters, 185 selfloop transitions, 19 changer transitions 0/316 dead transitions. [2021-10-15 19:49:31,531 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 316 transitions, 2124 flow [2021-10-15 19:49:31,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:49:31,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:49:31,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 743 transitions. [2021-10-15 19:49:31,545 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7312992125984252 [2021-10-15 19:49:31,545 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 743 transitions. [2021-10-15 19:49:31,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 743 transitions. [2021-10-15 19:49:31,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:49:31,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 743 transitions. [2021-10-15 19:49:31,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 185.75) internal successors, (743), 4 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:31,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:31,549 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:31,549 INFO L186 Difference]: Start difference. First operand has 284 places, 285 transitions, 1644 flow. Second operand 4 states and 743 transitions. [2021-10-15 19:49:31,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 316 transitions, 2124 flow [2021-10-15 19:49:31,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 316 transitions, 2118 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:49:31,578 INFO L242 Difference]: Finished difference. Result has 288 places, 287 transitions, 1711 flow [2021-10-15 19:49:31,579 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1638, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1711, PETRI_PLACES=288, PETRI_TRANSITIONS=287} [2021-10-15 19:49:31,579 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 151 predicate places. [2021-10-15 19:49:31,580 INFO L470 AbstractCegarLoop]: Abstraction has has 288 places, 287 transitions, 1711 flow [2021-10-15 19:49:31,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 161.25) internal successors, (645), 4 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:31,580 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:49:31,580 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:49:31,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-10-15 19:49:31,581 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:49:31,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:49:31,581 INFO L82 PathProgramCache]: Analyzing trace with hash 2075782866, now seen corresponding path program 1 times [2021-10-15 19:49:31,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:49:31,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508872440] [2021-10-15 19:49:31,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:49:31,582 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:49:31,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:49:31,646 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-15 19:49:31,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:49:31,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508872440] [2021-10-15 19:49:31,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508872440] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:49:31,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:49:31,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:49:31,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864411488] [2021-10-15 19:49:31,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:49:31,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:49:31,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:49:31,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:49:31,650 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 254 [2021-10-15 19:49:31,650 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 287 transitions, 1711 flow. Second operand has 3 states, 3 states have (on average 231.33333333333334) internal successors, (694), 3 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:31,651 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:49:31,651 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 254 [2021-10-15 19:49:31,651 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:49:31,829 INFO L129 PetriNetUnfolder]: 268/895 cut-off events. [2021-10-15 19:49:31,829 INFO L130 PetriNetUnfolder]: For 4699/4699 co-relation queries the response was YES. [2021-10-15 19:49:31,836 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2178 conditions, 895 events. 268/895 cut-off events. For 4699/4699 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3413 event pairs, 1 based on Foata normal form. 4/683 useless extension candidates. Maximal degree in co-relation 2087. Up to 75 conditions per place. [2021-10-15 19:49:31,846 INFO L132 encePairwiseOnDemand]: 242/254 looper letters, 28 selfloop transitions, 4 changer transitions 0/297 dead transitions. [2021-10-15 19:49:31,846 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 297 transitions, 1797 flow [2021-10-15 19:49:31,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:49:31,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:49:31,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 731 transitions. [2021-10-15 19:49:31,848 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9593175853018373 [2021-10-15 19:49:31,848 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 731 transitions. [2021-10-15 19:49:31,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 731 transitions. [2021-10-15 19:49:31,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:49:31,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 731 transitions. [2021-10-15 19:49:31,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 243.66666666666666) internal successors, (731), 3 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:31,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:31,853 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:31,853 INFO L186 Difference]: Start difference. First operand has 288 places, 287 transitions, 1711 flow. Second operand 3 states and 731 transitions. [2021-10-15 19:49:31,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 297 transitions, 1797 flow [2021-10-15 19:49:31,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 297 transitions, 1778 flow, removed 1 selfloop flow, removed 1 redundant places. [2021-10-15 19:49:31,883 INFO L242 Difference]: Finished difference. Result has 290 places, 289 transitions, 1730 flow [2021-10-15 19:49:31,884 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1692, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1730, PETRI_PLACES=290, PETRI_TRANSITIONS=289} [2021-10-15 19:49:31,886 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 153 predicate places. [2021-10-15 19:49:31,886 INFO L470 AbstractCegarLoop]: Abstraction has has 290 places, 289 transitions, 1730 flow [2021-10-15 19:49:31,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 231.33333333333334) internal successors, (694), 3 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:31,887 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:49:31,887 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:49:31,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-10-15 19:49:31,887 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:49:31,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:49:31,888 INFO L82 PathProgramCache]: Analyzing trace with hash 687773336, now seen corresponding path program 1 times [2021-10-15 19:49:31,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:49:31,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681850503] [2021-10-15 19:49:31,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:49:31,888 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:49:31,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:49:31,928 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-10-15 19:49:31,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:49:31,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681850503] [2021-10-15 19:49:31,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681850503] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:49:31,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:49:31,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:49:31,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702295646] [2021-10-15 19:49:31,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:49:31,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:49:31,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:49:31,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:49:31,932 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 254 [2021-10-15 19:49:31,933 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 289 transitions, 1730 flow. Second operand has 3 states, 3 states have (on average 231.33333333333334) internal successors, (694), 3 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:31,933 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:49:31,933 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 254 [2021-10-15 19:49:31,933 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:49:32,121 INFO L129 PetriNetUnfolder]: 267/893 cut-off events. [2021-10-15 19:49:32,121 INFO L130 PetriNetUnfolder]: For 4575/4575 co-relation queries the response was YES. [2021-10-15 19:49:32,128 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2167 conditions, 893 events. 267/893 cut-off events. For 4575/4575 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3231 event pairs, 1 based on Foata normal form. 1/689 useless extension candidates. Maximal degree in co-relation 2075. Up to 74 conditions per place. [2021-10-15 19:49:32,131 INFO L132 encePairwiseOnDemand]: 251/254 looper letters, 23 selfloop transitions, 2 changer transitions 0/290 dead transitions. [2021-10-15 19:49:32,131 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 290 transitions, 1786 flow [2021-10-15 19:49:32,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:49:32,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:49:32,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 713 transitions. [2021-10-15 19:49:32,133 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9356955380577427 [2021-10-15 19:49:32,133 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 713 transitions. [2021-10-15 19:49:32,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 713 transitions. [2021-10-15 19:49:32,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:49:32,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 713 transitions. [2021-10-15 19:49:32,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 237.66666666666666) internal successors, (713), 3 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:32,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:32,136 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:32,136 INFO L186 Difference]: Start difference. First operand has 290 places, 289 transitions, 1730 flow. Second operand 3 states and 713 transitions. [2021-10-15 19:49:32,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 290 transitions, 1786 flow [2021-10-15 19:49:32,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 290 transitions, 1782 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:49:32,164 INFO L242 Difference]: Finished difference. Result has 292 places, 290 transitions, 1742 flow [2021-10-15 19:49:32,165 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1726, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1742, PETRI_PLACES=292, PETRI_TRANSITIONS=290} [2021-10-15 19:49:32,165 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 155 predicate places. [2021-10-15 19:49:32,165 INFO L470 AbstractCegarLoop]: Abstraction has has 292 places, 290 transitions, 1742 flow [2021-10-15 19:49:32,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 231.33333333333334) internal successors, (694), 3 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:32,166 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:49:32,166 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:49:32,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-10-15 19:49:32,166 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:49:32,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:49:32,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1575564738, now seen corresponding path program 1 times [2021-10-15 19:49:32,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:49:32,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100560487] [2021-10-15 19:49:32,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:49:32,167 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:49:32,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:49:32,243 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-15 19:49:32,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:49:32,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100560487] [2021-10-15 19:49:32,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100560487] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:49:32,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:49:32,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:49:32,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718401322] [2021-10-15 19:49:32,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:49:32,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:49:32,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:49:32,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:49:32,246 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 254 [2021-10-15 19:49:32,247 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 290 transitions, 1742 flow. Second operand has 3 states, 3 states have (on average 231.66666666666666) internal successors, (695), 3 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:32,247 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:49:32,248 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 254 [2021-10-15 19:49:32,248 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:49:32,546 INFO L129 PetriNetUnfolder]: 401/1317 cut-off events. [2021-10-15 19:49:32,546 INFO L130 PetriNetUnfolder]: For 6706/6706 co-relation queries the response was YES. [2021-10-15 19:49:32,556 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3162 conditions, 1317 events. 401/1317 cut-off events. For 6706/6706 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 5053 event pairs, 1 based on Foata normal form. 2/1015 useless extension candidates. Maximal degree in co-relation 3056. Up to 109 conditions per place. [2021-10-15 19:49:32,560 INFO L132 encePairwiseOnDemand]: 243/254 looper letters, 34 selfloop transitions, 9 changer transitions 0/308 dead transitions. [2021-10-15 19:49:32,560 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 308 transitions, 1894 flow [2021-10-15 19:49:32,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:49:32,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:49:32,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 731 transitions. [2021-10-15 19:49:32,562 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9593175853018373 [2021-10-15 19:49:32,562 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 731 transitions. [2021-10-15 19:49:32,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 731 transitions. [2021-10-15 19:49:32,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:49:32,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 731 transitions. [2021-10-15 19:49:32,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 243.66666666666666) internal successors, (731), 3 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:32,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:32,565 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:32,565 INFO L186 Difference]: Start difference. First operand has 292 places, 290 transitions, 1742 flow. Second operand 3 states and 731 transitions. [2021-10-15 19:49:32,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 308 transitions, 1894 flow [2021-10-15 19:49:32,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 308 transitions, 1890 flow, removed 1 selfloop flow, removed 1 redundant places. [2021-10-15 19:49:32,596 INFO L242 Difference]: Finished difference. Result has 295 places, 298 transitions, 1832 flow [2021-10-15 19:49:32,597 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1738, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1832, PETRI_PLACES=295, PETRI_TRANSITIONS=298} [2021-10-15 19:49:32,597 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 158 predicate places. [2021-10-15 19:49:32,597 INFO L470 AbstractCegarLoop]: Abstraction has has 295 places, 298 transitions, 1832 flow [2021-10-15 19:49:32,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 231.66666666666666) internal successors, (695), 3 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:32,597 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:49:32,598 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:49:32,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-10-15 19:49:32,598 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:49:32,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:49:32,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1668917598, now seen corresponding path program 1 times [2021-10-15 19:49:32,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:49:32,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045139627] [2021-10-15 19:49:32,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:49:32,599 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:49:32,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:49:32,663 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-15 19:49:32,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:49:32,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045139627] [2021-10-15 19:49:32,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045139627] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:49:32,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:49:32,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:49:32,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185545299] [2021-10-15 19:49:32,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:49:32,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:49:32,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:49:32,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:49:32,667 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 254 [2021-10-15 19:49:32,668 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 298 transitions, 1832 flow. Second operand has 3 states, 3 states have (on average 232.0) internal successors, (696), 3 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:32,668 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:49:32,668 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 254 [2021-10-15 19:49:32,668 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:49:33,028 INFO L129 PetriNetUnfolder]: 504/1708 cut-off events. [2021-10-15 19:49:33,029 INFO L130 PetriNetUnfolder]: For 9033/9033 co-relation queries the response was YES. [2021-10-15 19:49:33,043 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4047 conditions, 1708 events. 504/1708 cut-off events. For 9033/9033 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 7786 event pairs, 1 based on Foata normal form. 32/1349 useless extension candidates. Maximal degree in co-relation 3927. Up to 144 conditions per place. [2021-10-15 19:49:33,048 INFO L132 encePairwiseOnDemand]: 246/254 looper letters, 34 selfloop transitions, 3 changer transitions 0/302 dead transitions. [2021-10-15 19:49:33,048 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 302 transitions, 1880 flow [2021-10-15 19:49:33,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:49:33,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:49:33,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 729 transitions. [2021-10-15 19:49:33,050 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9566929133858267 [2021-10-15 19:49:33,050 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 729 transitions. [2021-10-15 19:49:33,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 729 transitions. [2021-10-15 19:49:33,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:49:33,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 729 transitions. [2021-10-15 19:49:33,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:33,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:33,053 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:33,053 INFO L186 Difference]: Start difference. First operand has 295 places, 298 transitions, 1832 flow. Second operand 3 states and 729 transitions. [2021-10-15 19:49:33,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 302 transitions, 1880 flow [2021-10-15 19:49:33,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 302 transitions, 1874 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:49:33,083 INFO L242 Difference]: Finished difference. Result has 297 places, 292 transitions, 1798 flow [2021-10-15 19:49:33,083 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1766, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1798, PETRI_PLACES=297, PETRI_TRANSITIONS=292} [2021-10-15 19:49:33,083 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 160 predicate places. [2021-10-15 19:49:33,083 INFO L470 AbstractCegarLoop]: Abstraction has has 297 places, 292 transitions, 1798 flow [2021-10-15 19:49:33,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 232.0) internal successors, (696), 3 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:33,084 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:49:33,084 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:49:33,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-10-15 19:49:33,084 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:49:33,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:49:33,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1034789415, now seen corresponding path program 1 times [2021-10-15 19:49:33,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:49:33,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522019441] [2021-10-15 19:49:33,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:49:33,085 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:49:33,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:49:33,161 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-15 19:49:33,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:49:33,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522019441] [2021-10-15 19:49:33,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522019441] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:49:33,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:49:33,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:49:33,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129664563] [2021-10-15 19:49:33,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:49:33,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:49:33,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:49:33,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:49:33,164 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 254 [2021-10-15 19:49:33,165 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 292 transitions, 1798 flow. Second operand has 3 states, 3 states have (on average 232.0) internal successors, (696), 3 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:33,165 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:49:33,165 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 254 [2021-10-15 19:49:33,165 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:49:33,565 INFO L129 PetriNetUnfolder]: 636/2128 cut-off events. [2021-10-15 19:49:33,565 INFO L130 PetriNetUnfolder]: For 11119/11119 co-relation queries the response was YES. [2021-10-15 19:49:33,575 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5076 conditions, 2128 events. 636/2128 cut-off events. For 11119/11119 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 9585 event pairs, 1 based on Foata normal form. 3/1645 useless extension candidates. Maximal degree in co-relation 4942. Up to 179 conditions per place. [2021-10-15 19:49:33,579 INFO L132 encePairwiseOnDemand]: 245/254 looper letters, 35 selfloop transitions, 7 changer transitions 0/307 dead transitions. [2021-10-15 19:49:33,579 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 307 transitions, 1958 flow [2021-10-15 19:49:33,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:49:33,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:49:33,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 729 transitions. [2021-10-15 19:49:33,580 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9566929133858267 [2021-10-15 19:49:33,580 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 729 transitions. [2021-10-15 19:49:33,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 729 transitions. [2021-10-15 19:49:33,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:49:33,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 729 transitions. [2021-10-15 19:49:33,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:33,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:33,582 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:33,582 INFO L186 Difference]: Start difference. First operand has 297 places, 292 transitions, 1798 flow. Second operand 3 states and 729 transitions. [2021-10-15 19:49:33,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 307 transitions, 1958 flow [2021-10-15 19:49:33,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 307 transitions, 1954 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:49:33,614 INFO L242 Difference]: Finished difference. Result has 300 places, 297 transitions, 1886 flow [2021-10-15 19:49:33,614 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1795, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1886, PETRI_PLACES=300, PETRI_TRANSITIONS=297} [2021-10-15 19:49:33,615 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 163 predicate places. [2021-10-15 19:49:33,615 INFO L470 AbstractCegarLoop]: Abstraction has has 300 places, 297 transitions, 1886 flow [2021-10-15 19:49:33,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 232.0) internal successors, (696), 3 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:33,615 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:49:33,615 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:49:33,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-10-15 19:49:33,616 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:49:33,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:49:33,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1329906676, now seen corresponding path program 1 times [2021-10-15 19:49:33,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:49:33,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552221619] [2021-10-15 19:49:33,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:49:33,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:49:33,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:49:33,905 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-10-15 19:49:33,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:49:33,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552221619] [2021-10-15 19:49:33,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552221619] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:49:33,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:49:33,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 19:49:33,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631264184] [2021-10-15 19:49:33,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:49:33,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:49:33,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:49:33,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:49:33,909 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 254 [2021-10-15 19:49:33,910 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 297 transitions, 1886 flow. Second operand has 5 states, 5 states have (on average 152.4) internal successors, (762), 5 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:33,910 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:49:33,910 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 254 [2021-10-15 19:49:33,910 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:49:36,420 INFO L129 PetriNetUnfolder]: 638/2137 cut-off events. [2021-10-15 19:49:36,420 INFO L130 PetriNetUnfolder]: For 12396/12396 co-relation queries the response was YES. [2021-10-15 19:49:36,432 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6119 conditions, 2137 events. 638/2137 cut-off events. For 12396/12396 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 9586 event pairs, 1 based on Foata normal form. 1/2006 useless extension candidates. Maximal degree in co-relation 5969. Up to 1095 conditions per place. [2021-10-15 19:49:36,437 INFO L132 encePairwiseOnDemand]: 249/254 looper letters, 173 selfloop transitions, 0 changer transitions 5/301 dead transitions. [2021-10-15 19:49:36,437 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 301 transitions, 2274 flow [2021-10-15 19:49:36,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:49:36,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 19:49:36,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 971 transitions. [2021-10-15 19:49:36,439 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6371391076115486 [2021-10-15 19:49:36,439 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 971 transitions. [2021-10-15 19:49:36,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 971 transitions. [2021-10-15 19:49:36,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:49:36,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 971 transitions. [2021-10-15 19:49:36,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 161.83333333333334) internal successors, (971), 6 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:36,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 254.0) internal successors, (1778), 7 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:36,443 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 254.0) internal successors, (1778), 7 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:36,443 INFO L186 Difference]: Start difference. First operand has 300 places, 297 transitions, 1886 flow. Second operand 6 states and 971 transitions. [2021-10-15 19:49:36,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 301 transitions, 2274 flow [2021-10-15 19:49:36,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 301 transitions, 2240 flow, removed 9 selfloop flow, removed 2 redundant places. [2021-10-15 19:49:36,479 INFO L242 Difference]: Finished difference. Result has 307 places, 296 transitions, 1860 flow [2021-10-15 19:49:36,479 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1854, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1860, PETRI_PLACES=307, PETRI_TRANSITIONS=296} [2021-10-15 19:49:36,479 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 170 predicate places. [2021-10-15 19:49:36,480 INFO L470 AbstractCegarLoop]: Abstraction has has 307 places, 296 transitions, 1860 flow [2021-10-15 19:49:36,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 152.4) internal successors, (762), 5 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:36,480 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:49:36,480 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:49:36,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-10-15 19:49:36,480 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:49:36,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:49:36,481 INFO L82 PathProgramCache]: Analyzing trace with hash 188804472, now seen corresponding path program 1 times [2021-10-15 19:49:36,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:49:36,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296990389] [2021-10-15 19:49:36,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:49:36,482 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:49:36,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:49:36,971 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 19:49:37,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:49:37,347 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 19:49:37,347 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-15 19:49:37,349 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:49:37,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-10-15 19:49:37,359 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:49:37,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:49:37 BoogieIcfgContainer [2021-10-15 19:49:37,534 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:49:37,535 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:49:37,535 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:49:37,535 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:49:37,536 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:48:06" (3/4) ... [2021-10-15 19:49:37,539 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-15 19:49:37,540 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:49:37,541 INFO L168 Benchmark]: Toolchain (without parser) took 93781.74 ms. Allocated memory was 109.1 MB in the beginning and 304.1 MB in the end (delta: 195.0 MB). Free memory was 76.7 MB in the beginning and 197.2 MB in the end (delta: -120.5 MB). Peak memory consumption was 74.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:49:37,542 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 109.1 MB. Free memory was 64.9 MB in the beginning and 64.8 MB in the end (delta: 59.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:49:37,542 INFO L168 Benchmark]: CACSL2BoogieTranslator took 751.73 ms. Allocated memory was 109.1 MB in the beginning and 132.1 MB in the end (delta: 23.1 MB). Free memory was 76.4 MB in the beginning and 85.3 MB in the end (delta: -8.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:49:37,543 INFO L168 Benchmark]: Boogie Procedure Inliner took 99.05 ms. Allocated memory is still 132.1 MB. Free memory was 85.3 MB in the beginning and 80.4 MB in the end (delta: 4.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-15 19:49:37,544 INFO L168 Benchmark]: Boogie Preprocessor took 119.87 ms. Allocated memory is still 132.1 MB. Free memory was 80.4 MB in the beginning and 73.2 MB in the end (delta: 7.1 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-15 19:49:37,547 INFO L168 Benchmark]: RCFGBuilder took 1882.10 ms. Allocated memory is still 132.1 MB. Free memory was 73.2 MB in the beginning and 90.6 MB in the end (delta: -17.3 MB). Peak memory consumption was 31.3 MB. Max. memory is 16.1 GB. [2021-10-15 19:49:37,548 INFO L168 Benchmark]: TraceAbstraction took 90910.10 ms. Allocated memory was 132.1 MB in the beginning and 304.1 MB in the end (delta: 172.0 MB). Free memory was 90.6 MB in the beginning and 197.2 MB in the end (delta: -106.7 MB). Peak memory consumption was 137.0 MB. Max. memory is 16.1 GB. [2021-10-15 19:49:37,548 INFO L168 Benchmark]: Witness Printer took 4.80 ms. Allocated memory is still 304.1 MB. Free memory is still 197.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:49:37,551 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 109.1 MB. Free memory was 64.9 MB in the beginning and 64.8 MB in the end (delta: 59.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 751.73 ms. Allocated memory was 109.1 MB in the beginning and 132.1 MB in the end (delta: 23.1 MB). Free memory was 76.4 MB in the beginning and 85.3 MB in the end (delta: -8.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 99.05 ms. Allocated memory is still 132.1 MB. Free memory was 85.3 MB in the beginning and 80.4 MB in the end (delta: 4.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 119.87 ms. Allocated memory is still 132.1 MB. Free memory was 80.4 MB in the beginning and 73.2 MB in the end (delta: 7.1 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1882.10 ms. Allocated memory is still 132.1 MB. Free memory was 73.2 MB in the beginning and 90.6 MB in the end (delta: -17.3 MB). Peak memory consumption was 31.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 90910.10 ms. Allocated memory was 132.1 MB in the beginning and 304.1 MB in the end (delta: 172.0 MB). Free memory was 90.6 MB in the beginning and 197.2 MB in the end (delta: -106.7 MB). Peak memory consumption was 137.0 MB. Max. memory is 16.1 GB. * Witness Printer took 4.80 ms. Allocated memory is still 304.1 MB. Free memory is still 197.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 1757]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseAnd at line 1475. Possible FailurePath: [L1054] static int init = 1; [L1055] static SSL_METHOD SSLv3_server_data ; VAL [init=1, SSLv3_server_data={4294967302:0}] [L1077] SSL *s ; [L1078] int tmp ; [L1082] s = malloc(sizeof(SSL)) [L1083] s->s3 = malloc(sizeof(struct ssl3_state_st)) [L1084] s->ctx = malloc(sizeof(SSL_CTX)) [L1085] s->session = malloc(sizeof(SSL_SESSION)) [L1087] s->info_callback = (void (*) ()) __VERIFIER_nondet_ulong() [L1088] s->options = __VERIFIER_nondet_ulong() [L1089] s->verify_mode = __VERIFIER_nondet_int() [L1090] EXPR s->session [L1090] (s->session)->peer = (struct x509_st*) __VERIFIER_nondet_ulong() [L1091] EXPR s->s3 [L1091] (s->s3)->tmp.cert_request = __VERIFIER_nondet_int() [L1092] EXPR s->s3 [L1092] (s->s3)->tmp.new_cipher = malloc(sizeof(struct ssl_cipher_st)) [L1093] EXPR s->s3 [L1093] EXPR (s->s3)->tmp.new_cipher [L1093] ((s->s3)->tmp.new_cipher)->algorithms = __VERIFIER_nondet_ulong() [L1094] EXPR s->s3 [L1094] EXPR (s->s3)->tmp.new_cipher [L1094] ((s->s3)->tmp.new_cipher)->algo_strength = __VERIFIER_nondet_ulong() [L1095] COND FALSE !(__VERIFIER_nondet_int()) [L1101] s->cert = malloc(sizeof(struct cert_st)) [L1102] EXPR s->cert [L1102] (s->cert)->pkeys[0].privatekey = (struct evp_pkey_st*) __VERIFIER_nondet_ulong() [L1111] BUF_MEM *buf ; [L1112] unsigned long l ; [L1113] unsigned long Time ; [L1114] unsigned long tmp ; [L1115] void (*cb)() ; [L1116] long num1 ; [L1117] int ret ; [L1118] int new_state ; [L1119] int state ; [L1120] int skip ; [L1121] int got_new_session ; [L1122] int tmp___1 = __VERIFIER_nondet_int() ; [L1123] int tmp___2 = __VERIFIER_nondet_int() ; [L1124] int tmp___3 = __VERIFIER_nondet_int() ; [L1125] int tmp___4 = __VERIFIER_nondet_int() ; [L1126] int tmp___5 = __VERIFIER_nondet_int() ; [L1127] int tmp___6 = __VERIFIER_nondet_int() ; [L1128] int tmp___7 ; [L1129] long tmp___8 = __VERIFIER_nondet_long() ; [L1130] int tmp___9 = __VERIFIER_nondet_int() ; [L1131] int tmp___10 = __VERIFIER_nondet_int() ; [L1132] int blastFlag ; [L1136] s->state = 8464 [L1137] blastFlag = 0 [L1138] s->hit=__VERIFIER_nondet_int () [L1139] s->state = 8464 [L1140] tmp = __VERIFIER_nondet_int() [L1141] Time = tmp [L1142] cb = (void (*)())((void *)0) [L1143] ret = -1 [L1144] skip = 0 [L1145] got_new_session = 0 [L1146] EXPR s->info_callback VAL [init=1, SSLv3_server_data={4294967302:0}] [L1146] COND FALSE !((unsigned long )s->info_callback != (unsigned long )((void *)0)) [L1151] EXPR s->in_handshake [L1151] s->in_handshake += 1 [L1152] COND FALSE !(tmp___1 & 12288) VAL [init=1, SSLv3_server_data={4294967302:0}] [L1161] EXPR s->cert VAL [init=1, SSLv3_server_data={4294967302:0}] [L1161] COND FALSE !((unsigned long )s->cert == (unsigned long )((void *)0)) [L1167] COND TRUE 1 VAL [init=1, SSLv3_server_data={4294967302:0}] [L1169] EXPR s->state [L1169] state = s->state [L1170] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1170] COND FALSE !(s->state == 12292) [L1173] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1173] COND FALSE !(s->state == 16384) [L1176] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1176] COND FALSE !(s->state == 8192) [L1179] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1179] COND FALSE !(s->state == 24576) [L1182] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1182] COND FALSE !(s->state == 8195) [L1185] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1185] COND FALSE !(s->state == 8480) [L1188] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1188] COND FALSE !(s->state == 8481) [L1191] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1191] COND FALSE !(s->state == 8482) [L1194] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1194] COND TRUE s->state == 8464 [L1354] s->shutdown = 0 [L1355] ret = __VERIFIER_nondet_int() [L1356] COND TRUE blastFlag == 0 [L1357] blastFlag = 1 VAL [init=1, SSLv3_server_data={4294967302:0}] [L1361] COND FALSE !(ret <= 0) [L1366] got_new_session = 1 [L1367] s->state = 8496 [L1368] s->init_num = 0 VAL [init=1, SSLv3_server_data={4294967302:0}] [L1716] EXPR s->s3 [L1716] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_server_data={4294967302:0}] [L1716] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1745] skip = 0 VAL [init=1, SSLv3_server_data={4294967302:0}] [L1167] COND TRUE 1 VAL [init=1, SSLv3_server_data={4294967302:0}] [L1169] EXPR s->state [L1169] state = s->state [L1170] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1170] COND FALSE !(s->state == 12292) [L1173] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1173] COND FALSE !(s->state == 16384) [L1176] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1176] COND FALSE !(s->state == 8192) [L1179] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1179] COND FALSE !(s->state == 24576) [L1182] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1182] COND FALSE !(s->state == 8195) [L1185] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1185] COND FALSE !(s->state == 8480) [L1188] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1188] COND FALSE !(s->state == 8481) [L1191] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1191] COND FALSE !(s->state == 8482) [L1194] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1194] COND FALSE !(s->state == 8464) [L1197] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1197] COND FALSE !(s->state == 8465) [L1200] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1200] COND FALSE !(s->state == 8466) [L1203] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1203] COND TRUE s->state == 8496 [L1372] ret = __VERIFIER_nondet_int() [L1373] COND TRUE blastFlag == 1 [L1374] blastFlag = 2 VAL [init=1, SSLv3_server_data={4294967302:0}] [L1378] COND FALSE !(ret <= 0) [L1383] s->hit VAL [init=1, SSLv3_server_data={4294967302:0}] [L1383] COND FALSE !(s->hit) [L1386] s->state = 8512 VAL [init=1, SSLv3_server_data={4294967302:0}] [L1388] s->init_num = 0 VAL [init=1, SSLv3_server_data={4294967302:0}] [L1716] EXPR s->s3 [L1716] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_server_data={4294967302:0}] [L1716] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1745] skip = 0 VAL [init=1, SSLv3_server_data={4294967302:0}] [L1167] COND TRUE 1 VAL [init=1, SSLv3_server_data={4294967302:0}] [L1169] EXPR s->state [L1169] state = s->state [L1170] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1170] COND FALSE !(s->state == 12292) [L1173] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1173] COND FALSE !(s->state == 16384) [L1176] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1176] COND FALSE !(s->state == 8192) [L1179] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1179] COND FALSE !(s->state == 24576) [L1182] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1182] COND FALSE !(s->state == 8195) [L1185] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1185] COND FALSE !(s->state == 8480) [L1188] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1188] COND FALSE !(s->state == 8481) [L1191] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1191] COND FALSE !(s->state == 8482) [L1194] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1194] COND FALSE !(s->state == 8464) [L1197] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1197] COND FALSE !(s->state == 8465) [L1200] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1200] COND FALSE !(s->state == 8466) [L1203] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1203] COND FALSE !(s->state == 8496) [L1206] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1206] COND FALSE !(s->state == 8497) [L1209] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1209] COND TRUE s->state == 8512 [L1392] EXPR s->s3 [L1392] EXPR (s->s3)->tmp.new_cipher [L1392] EXPR ((s->s3)->tmp.new_cipher)->algorithms VAL [init=1, SSLv3_server_data={4294967302:0}] [L1392] COND FALSE !(((s->s3)->tmp.new_cipher)->algorithms & 256UL) [L1395] ret = __VERIFIER_nondet_int() [L1396] COND TRUE blastFlag == 2 [L1397] blastFlag = 6 VAL [init=1, SSLv3_server_data={4294967302:0}] [L1401] COND FALSE !(ret <= 0) VAL [init=1, SSLv3_server_data={4294967302:0}] [L1407] s->state = 8528 [L1408] s->init_num = 0 VAL [init=1, SSLv3_server_data={4294967302:0}] [L1716] EXPR s->s3 [L1716] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_server_data={4294967302:0}] [L1716] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1745] skip = 0 VAL [init=1, SSLv3_server_data={4294967302:0}] [L1167] COND TRUE 1 VAL [init=1, SSLv3_server_data={4294967302:0}] [L1169] EXPR s->state [L1169] state = s->state [L1170] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1170] COND FALSE !(s->state == 12292) [L1173] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1173] COND FALSE !(s->state == 16384) [L1176] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1176] COND FALSE !(s->state == 8192) [L1179] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1179] COND FALSE !(s->state == 24576) [L1182] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1182] COND FALSE !(s->state == 8195) [L1185] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1185] COND FALSE !(s->state == 8480) [L1188] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1188] COND FALSE !(s->state == 8481) [L1191] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1191] COND FALSE !(s->state == 8482) [L1194] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1194] COND FALSE !(s->state == 8464) [L1197] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1197] COND FALSE !(s->state == 8465) [L1200] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1200] COND FALSE !(s->state == 8466) [L1203] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1203] COND FALSE !(s->state == 8496) [L1206] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1206] COND FALSE !(s->state == 8497) [L1209] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1209] COND FALSE !(s->state == 8512) [L1212] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1212] COND FALSE !(s->state == 8513) [L1215] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1215] COND TRUE s->state == 8528 [L1412] EXPR s->s3 [L1412] EXPR (s->s3)->tmp.new_cipher [L1412] EXPR ((s->s3)->tmp.new_cipher)->algorithms [L1412] l = ((s->s3)->tmp.new_cipher)->algorithms [L1413] EXPR s->options VAL [init=1, SSLv3_server_data={4294967302:0}] [L1413] COND TRUE s->options & 2097152UL [L1414] EXPR s->s3 [L1414] (s->s3)->tmp.use_rsa_tmp = 1 [L1418] EXPR s->s3 [L1418] (s->s3)->tmp.use_rsa_tmp VAL [init=1, SSLv3_server_data={4294967302:0}] [L1418] COND TRUE (s->s3)->tmp.use_rsa_tmp [L1436] ret = __VERIFIER_nondet_int() [L1437] COND TRUE blastFlag == 6 [L1438] blastFlag = 7 VAL [init=1, SSLv3_server_data={4294967302:0}] [L1442] COND FALSE !(ret <= 0) VAL [init=1, SSLv3_server_data={4294967302:0}] [L1459] s->state = 8544 [L1460] s->init_num = 0 VAL [init=1, SSLv3_server_data={4294967302:0}] [L1716] EXPR s->s3 [L1716] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_server_data={4294967302:0}] [L1716] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1745] skip = 0 VAL [init=1, SSLv3_server_data={4294967302:0}] [L1167] COND TRUE 1 VAL [init=1, SSLv3_server_data={4294967302:0}] [L1169] EXPR s->state [L1169] state = s->state [L1170] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1170] COND FALSE !(s->state == 12292) [L1173] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1173] COND FALSE !(s->state == 16384) [L1176] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1176] COND FALSE !(s->state == 8192) [L1179] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1179] COND FALSE !(s->state == 24576) [L1182] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1182] COND FALSE !(s->state == 8195) [L1185] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1185] COND FALSE !(s->state == 8480) [L1188] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1188] COND FALSE !(s->state == 8481) [L1191] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1191] COND FALSE !(s->state == 8482) [L1194] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1194] COND FALSE !(s->state == 8464) [L1197] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1197] COND FALSE !(s->state == 8465) [L1200] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1200] COND FALSE !(s->state == 8466) [L1203] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1203] COND FALSE !(s->state == 8496) [L1206] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1206] COND FALSE !(s->state == 8497) [L1209] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1209] COND FALSE !(s->state == 8512) [L1212] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1212] COND FALSE !(s->state == 8513) [L1215] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1215] COND FALSE !(s->state == 8528) [L1218] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1218] COND FALSE !(s->state == 8529) [L1221] EXPR s->state VAL [init=1, SSLv3_server_data={4294967302:0}] [L1221] COND TRUE s->state == 8544 [L1464] EXPR s->verify_mode VAL [init=1, SSLv3_server_data={4294967302:0}] [L1464] COND TRUE s->verify_mode & 1 [L1465] EXPR s->session [L1465] EXPR (s->session)->peer VAL [init=1, SSLv3_server_data={4294967302:0}] [L1465] COND FALSE !((unsigned long )(s->session)->peer != (unsigned long )((void *)0)) [L1475] EXPR s->s3 [L1475] EXPR (s->s3)->tmp.new_cipher [L1475] EXPR ((s->s3)->tmp.new_cipher)->algorithms VAL [init=1, SSLv3_server_data={4294967302:0}] [L1475] COND FALSE !(((s->s3)->tmp.new_cipher)->algorithms & 256UL) [L1485] EXPR s->s3 [L1485] (s->s3)->tmp.cert_request = 1 [L1486] ret = __VERIFIER_nondet_int() [L1487] COND TRUE blastFlag == 7 VAL [init=1, SSLv3_server_data={4294967302:0}] [L1757] reach_error() VAL [init=1, SSLv3_server_data={4294967302:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 150 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 19.2ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 90657.8ms, OverallIterations: 49, TraceHistogramMax: 5, EmptinessCheckTime: 0.0ms, AutomataDifference: 85142.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 114.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3445 SDtfs, 742 SDslu, 3316 SDs, 0 SdLazy, 8113 SolverSat, 417 SolverUnsat, 17 SolverUnknown, 0 SolverNotchecked, 75036.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 266 GetRequests, 97 SyntacticMatches, 33 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 716.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1886occurred in iteration=47, InterpolantAutomatonStates: 190, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 285.7ms SsaConstructionTime, 1691.3ms SatisfiabilityAnalysisTime, 2430.0ms InterpolantComputationTime, 3956 NumberOfCodeBlocks, 3956 NumberOfCodeBlocksAsserted, 49 NumberOfCheckSat, 3779 ConstructedInterpolants, 0 QuantifiedInterpolants, 11164 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 48 InterpolantComputations, 48 PerfectInterpolantSequences, 2287/2287 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-15 19:49:37,590 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-5709675 [2021-10-15 19:49:39,927 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:49:39,930 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:49:39,985 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:49:39,986 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:49:39,991 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:49:39,993 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:49:40,001 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:49:40,004 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:49:40,012 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:49:40,013 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:49:40,015 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:49:40,016 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:49:40,018 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:49:40,021 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:49:40,026 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:49:40,028 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:49:40,029 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:49:40,031 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:49:40,041 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:49:40,044 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:49:40,045 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:49:40,048 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:49:40,050 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:49:40,054 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:49:40,055 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:49:40,055 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:49:40,057 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:49:40,058 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:49:40,059 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:49:40,059 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:49:40,061 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:49:40,063 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:49:40,064 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:49:40,066 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:49:40,066 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:49:40,067 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:49:40,067 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:49:40,068 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:49:40,070 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:49:40,071 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:49:40,076 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-10-15 19:49:40,119 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:49:40,120 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:49:40,120 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:49:40,120 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:49:40,123 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:49:40,123 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:49:40,123 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:49:40,123 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:49:40,124 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:49:40,124 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:49:40,125 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:49:40,125 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:49:40,126 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:49:40,126 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:49:40,126 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-15 19:49:40,126 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-15 19:49:40,126 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:49:40,127 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:49:40,127 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:49:40,127 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:49:40,127 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:49:40,128 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:49:40,128 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:49:40,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:49:40,128 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:49:40,129 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:49:40,129 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:49:40,129 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-15 19:49:40,129 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-15 19:49:40,130 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:49:40,130 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:49:40,130 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:49:40,130 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:49:40,131 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-15 19:49:40,131 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 91d14ac062f05fd105cce7a665423d189aaea162 [2021-10-15 19:49:40,517 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:49:40,547 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:49:40,551 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:49:40,552 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:49:40,553 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:49:40,554 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-1.c [2021-10-15 19:49:40,630 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/data/d838630cb/018a5eae9bce4ea986d8e3470975d104/FLAG9aee93392 [2021-10-15 19:49:41,358 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:49:41,358 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-1.c [2021-10-15 19:49:41,381 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/data/d838630cb/018a5eae9bce4ea986d8e3470975d104/FLAG9aee93392 [2021-10-15 19:49:41,501 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/data/d838630cb/018a5eae9bce4ea986d8e3470975d104 [2021-10-15 19:49:41,504 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:49:41,505 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:49:41,507 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:49:41,507 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:49:41,510 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:49:41,511 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:49:41" (1/1) ... [2021-10-15 19:49:41,513 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e3bf5ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:49:41, skipping insertion in model container [2021-10-15 19:49:41,513 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:49:41" (1/1) ... [2021-10-15 19:49:41,520 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:49:41,592 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:49:42,001 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-1.c[74369,74382] [2021-10-15 19:49:42,012 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:49:42,030 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:49:42,230 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-1.c[74369,74382] [2021-10-15 19:49:42,233 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:49:42,260 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:49:42,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:49:42 WrapperNode [2021-10-15 19:49:42,261 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:49:42,262 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:49:42,262 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:49:42,262 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:49:42,269 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:49:42" (1/1) ... [2021-10-15 19:49:42,313 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:49:42" (1/1) ... [2021-10-15 19:49:42,410 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:49:42,411 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:49:42,411 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:49:42,411 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:49:42,420 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:49:42" (1/1) ... [2021-10-15 19:49:42,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:49:42" (1/1) ... [2021-10-15 19:49:42,430 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:49:42" (1/1) ... [2021-10-15 19:49:42,448 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:49:42" (1/1) ... [2021-10-15 19:49:42,510 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:49:42" (1/1) ... [2021-10-15 19:49:42,524 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:49:42" (1/1) ... [2021-10-15 19:49:42,542 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:49:42" (1/1) ... [2021-10-15 19:49:42,549 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:49:42,550 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:49:42,559 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:49:42,559 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:49:42,560 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:49:42" (1/1) ... [2021-10-15 19:49:42,578 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:49:42,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:49:42,598 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:49:42,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:49:42,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-15 19:49:42,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-15 19:49:42,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:49:42,638 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-15 19:49:42,638 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-15 19:49:42,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-15 19:49:42,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:49:42,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:49:42,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-15 19:49:42,884 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-10-15 19:49:47,090 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-10-15 19:49:47,090 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-10-15 19:49:47,098 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:49:47,099 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-15 19:49:47,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:49:47 BoogieIcfgContainer [2021-10-15 19:49:47,101 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:49:47,103 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:49:47,103 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:49:47,106 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:49:47,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:49:41" (1/3) ... [2021-10-15 19:49:47,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6444af3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:49:47, skipping insertion in model container [2021-10-15 19:49:47,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:49:42" (2/3) ... [2021-10-15 19:49:47,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6444af3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:49:47, skipping insertion in model container [2021-10-15 19:49:47,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:49:47" (3/3) ... [2021-10-15 19:49:47,109 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.11.i.cil-1.c [2021-10-15 19:49:47,114 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:49:47,115 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:49:47,162 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:49:47,168 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-15 19:49:47,168 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:49:47,185 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 150 places, 254 transitions, 508 flow [2021-10-15 19:49:47,240 INFO L129 PetriNetUnfolder]: 105/254 cut-off events. [2021-10-15 19:49:47,240 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:49:47,243 INFO L84 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 254 events. 105/254 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 495 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 0. Up to 26 conditions per place. [2021-10-15 19:49:47,243 INFO L82 GeneralOperation]: Start removeDead. Operand has 150 places, 254 transitions, 508 flow [2021-10-15 19:49:47,251 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 137 places, 210 transitions, 420 flow [2021-10-15 19:49:47,282 INFO L129 PetriNetUnfolder]: 59/168 cut-off events. [2021-10-15 19:49:47,283 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:49:47,283 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:49:47,284 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:49:47,284 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:49:47,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:49:47,300 INFO L82 PathProgramCache]: Analyzing trace with hash -442385417, now seen corresponding path program 1 times [2021-10-15 19:49:47,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:49:47,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1095670388] [2021-10-15 19:49:47,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:49:47,314 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:49:47,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:49:47,317 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:49:47,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-15 19:49:47,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:49:47,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:49:47,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:49:47,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:49:47,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:49:48,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:49:48,185 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:49:48,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1095670388] [2021-10-15 19:49:48,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1095670388] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:49:48,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:49:48,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-15 19:49:48,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221083411] [2021-10-15 19:49:48,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:49:48,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:49:48,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:49:48,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:49:48,217 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 254 [2021-10-15 19:49:48,224 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 210 transitions, 420 flow. Second operand has 4 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:48,224 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:49:48,224 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 254 [2021-10-15 19:49:48,225 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:49:48,447 INFO L129 PetriNetUnfolder]: 200/583 cut-off events. [2021-10-15 19:49:48,447 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:49:48,449 INFO L84 FinitePrefix]: Finished finitePrefix Result has 634 conditions, 583 events. 200/583 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1545 event pairs, 0 based on Foata normal form. 0/382 useless extension candidates. Maximal degree in co-relation 166. Up to 60 conditions per place. [2021-10-15 19:49:48,454 INFO L132 encePairwiseOnDemand]: 240/254 looper letters, 36 selfloop transitions, 13 changer transitions 0/238 dead transitions. [2021-10-15 19:49:48,454 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 238 transitions, 574 flow [2021-10-15 19:49:48,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:49:48,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:49:48,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 981 transitions. [2021-10-15 19:49:48,475 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9655511811023622 [2021-10-15 19:49:48,476 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 981 transitions. [2021-10-15 19:49:48,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 981 transitions. [2021-10-15 19:49:48,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:49:48,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 981 transitions. [2021-10-15 19:49:48,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 245.25) internal successors, (981), 4 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:48,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:48,500 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:48,502 INFO L186 Difference]: Start difference. First operand has 137 places, 210 transitions, 420 flow. Second operand 4 states and 981 transitions. [2021-10-15 19:49:48,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 238 transitions, 574 flow [2021-10-15 19:49:48,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 238 transitions, 574 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:49:48,516 INFO L242 Difference]: Finished difference. Result has 143 places, 221 transitions, 534 flow [2021-10-15 19:49:48,518 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=534, PETRI_PLACES=143, PETRI_TRANSITIONS=221} [2021-10-15 19:49:48,519 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 6 predicate places. [2021-10-15 19:49:48,520 INFO L470 AbstractCegarLoop]: Abstraction has has 143 places, 221 transitions, 534 flow [2021-10-15 19:49:48,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:48,521 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:49:48,521 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:49:48,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:49:48,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:49:48,734 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:49:48,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:49:48,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1287801256, now seen corresponding path program 1 times [2021-10-15 19:49:48,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:49:48,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1286545968] [2021-10-15 19:49:48,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:49:48,736 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:49:48,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:49:48,738 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:49:48,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-15 19:49:48,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:49:48,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:49:48,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:49:49,291 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:49:49,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:49:49,582 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:49:49,582 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:49:49,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1286545968] [2021-10-15 19:49:49,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1286545968] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:49:49,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:49:49,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-15 19:49:49,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854527936] [2021-10-15 19:49:49,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:49:49,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:49:49,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:49:49,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:49:49,589 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 254 [2021-10-15 19:49:49,590 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 221 transitions, 534 flow. Second operand has 4 states, 4 states have (on average 231.75) internal successors, (927), 4 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:49,591 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:49:49,591 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 254 [2021-10-15 19:49:49,591 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:49:49,985 INFO L129 PetriNetUnfolder]: 325/954 cut-off events. [2021-10-15 19:49:50,000 INFO L130 PetriNetUnfolder]: For 103/103 co-relation queries the response was YES. [2021-10-15 19:49:50,003 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1100 conditions, 954 events. 325/954 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2876 event pairs, 0 based on Foata normal form. 10/661 useless extension candidates. Maximal degree in co-relation 634. Up to 101 conditions per place. [2021-10-15 19:49:50,009 INFO L132 encePairwiseOnDemand]: 243/254 looper letters, 43 selfloop transitions, 14 changer transitions 0/246 dead transitions. [2021-10-15 19:49:50,010 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 246 transitions, 734 flow [2021-10-15 19:49:50,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:49:50,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:49:50,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 976 transitions. [2021-10-15 19:49:50,017 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9606299212598425 [2021-10-15 19:49:50,017 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 976 transitions. [2021-10-15 19:49:50,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 976 transitions. [2021-10-15 19:49:50,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:49:50,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 976 transitions. [2021-10-15 19:49:50,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 244.0) internal successors, (976), 4 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:50,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:50,027 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:50,027 INFO L186 Difference]: Start difference. First operand has 143 places, 221 transitions, 534 flow. Second operand 4 states and 976 transitions. [2021-10-15 19:49:50,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 246 transitions, 734 flow [2021-10-15 19:49:50,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 246 transitions, 734 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:49:50,047 INFO L242 Difference]: Finished difference. Result has 149 places, 229 transitions, 662 flow [2021-10-15 19:49:50,048 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=662, PETRI_PLACES=149, PETRI_TRANSITIONS=229} [2021-10-15 19:49:50,048 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 12 predicate places. [2021-10-15 19:49:50,048 INFO L470 AbstractCegarLoop]: Abstraction has has 149 places, 229 transitions, 662 flow [2021-10-15 19:49:50,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 231.75) internal successors, (927), 4 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:50,050 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:49:50,051 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:49:50,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:49:50,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:49:50,264 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:49:50,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:49:50,265 INFO L82 PathProgramCache]: Analyzing trace with hash 393853380, now seen corresponding path program 1 times [2021-10-15 19:49:50,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:49:50,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1086883773] [2021-10-15 19:49:50,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:49:50,267 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:49:50,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:49:50,273 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:49:50,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-15 19:49:50,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:49:50,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:49:50,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:49:50,994 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-15 19:49:50,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:49:51,412 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-15 19:49:51,413 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:49:51,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1086883773] [2021-10-15 19:49:51,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1086883773] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:49:51,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:49:51,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-15 19:49:51,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580327441] [2021-10-15 19:49:51,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:49:51,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:49:51,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:49:51,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:49:51,419 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 254 [2021-10-15 19:49:51,420 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 229 transitions, 662 flow. Second operand has 4 states, 4 states have (on average 231.75) internal successors, (927), 4 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:51,421 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:49:51,421 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 254 [2021-10-15 19:49:51,421 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:49:51,794 INFO L129 PetriNetUnfolder]: 449/1324 cut-off events. [2021-10-15 19:49:51,795 INFO L130 PetriNetUnfolder]: For 349/349 co-relation queries the response was YES. [2021-10-15 19:49:51,798 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1580 conditions, 1324 events. 449/1324 cut-off events. For 349/349 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 4424 event pairs, 0 based on Foata normal form. 10/911 useless extension candidates. Maximal degree in co-relation 1096. Up to 142 conditions per place. [2021-10-15 19:49:51,804 INFO L132 encePairwiseOnDemand]: 243/254 looper letters, 47 selfloop transitions, 17 changer transitions 0/253 dead transitions. [2021-10-15 19:49:51,804 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 253 transitions, 906 flow [2021-10-15 19:49:51,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:49:51,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:49:51,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 975 transitions. [2021-10-15 19:49:51,809 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9596456692913385 [2021-10-15 19:49:51,809 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 975 transitions. [2021-10-15 19:49:51,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 975 transitions. [2021-10-15 19:49:51,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:49:51,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 975 transitions. [2021-10-15 19:49:51,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 243.75) internal successors, (975), 4 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:51,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:51,818 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:51,818 INFO L186 Difference]: Start difference. First operand has 149 places, 229 transitions, 662 flow. Second operand 4 states and 975 transitions. [2021-10-15 19:49:51,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 253 transitions, 906 flow [2021-10-15 19:49:51,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 253 transitions, 906 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:49:51,832 INFO L242 Difference]: Finished difference. Result has 154 places, 236 transitions, 799 flow [2021-10-15 19:49:51,832 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=646, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=799, PETRI_PLACES=154, PETRI_TRANSITIONS=236} [2021-10-15 19:49:51,833 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 17 predicate places. [2021-10-15 19:49:51,833 INFO L470 AbstractCegarLoop]: Abstraction has has 154 places, 236 transitions, 799 flow [2021-10-15 19:49:51,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 231.75) internal successors, (927), 4 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:51,834 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:49:51,834 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:49:51,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-10-15 19:49:52,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:49:52,048 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:49:52,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:49:52,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1006485834, now seen corresponding path program 1 times [2021-10-15 19:49:52,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:49:52,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [51766258] [2021-10-15 19:49:52,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:49:52,051 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:49:52,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:49:52,052 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:49:52,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-15 19:49:52,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:49:52,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-15 19:49:52,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:49:52,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-15 19:49:52,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-15 19:49:52,837 INFO L354 Elim1Store]: treesize reduction 96, result has 16.5 percent of original size [2021-10-15 19:49:52,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 41 [2021-10-15 19:49:52,872 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-10-15 19:49:52,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-10-15 19:49:52,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:49:52,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:49:52,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:49:52,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 22 [2021-10-15 19:49:53,035 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-10-15 19:49:53,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-10-15 19:49:53,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:49:53,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-10-15 19:49:53,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-10-15 19:49:53,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-10-15 19:49:53,525 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-10-15 19:49:53,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:49:54,288 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-10-15 19:49:54,289 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:49:54,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [51766258] [2021-10-15 19:49:54,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [51766258] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:49:54,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:49:54,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-15 19:49:54,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304510984] [2021-10-15 19:49:54,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:49:54,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:49:54,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:49:54,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:49:54,295 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 254 [2021-10-15 19:49:54,297 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 236 transitions, 799 flow. Second operand has 8 states, 8 states have (on average 150.0) internal successors, (1200), 8 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:49:54,297 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:49:54,298 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 254 [2021-10-15 19:49:54,298 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:50:05,078 INFO L129 PetriNetUnfolder]: 451/1333 cut-off events. [2021-10-15 19:50:05,078 INFO L130 PetriNetUnfolder]: For 294/294 co-relation queries the response was YES. [2021-10-15 19:50:05,083 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2205 conditions, 1333 events. 451/1333 cut-off events. For 294/294 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 4334 event pairs, 0 based on Foata normal form. 1/1232 useless extension candidates. Maximal degree in co-relation 1528. Up to 649 conditions per place. [2021-10-15 19:50:05,089 INFO L132 encePairwiseOnDemand]: 249/254 looper letters, 101 selfloop transitions, 0 changer transitions 5/240 dead transitions. [2021-10-15 19:50:05,089 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 240 transitions, 1030 flow [2021-10-15 19:50:05,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:50:05,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 19:50:05,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 971 transitions. [2021-10-15 19:50:05,095 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6371391076115486 [2021-10-15 19:50:05,095 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 971 transitions. [2021-10-15 19:50:05,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 971 transitions. [2021-10-15 19:50:05,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:50:05,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 971 transitions. [2021-10-15 19:50:05,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 161.83333333333334) internal successors, (971), 6 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:50:05,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 254.0) internal successors, (1778), 7 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:50:05,111 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 254.0) internal successors, (1778), 7 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:50:05,111 INFO L186 Difference]: Start difference. First operand has 154 places, 236 transitions, 799 flow. Second operand 6 states and 971 transitions. [2021-10-15 19:50:05,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 240 transitions, 1030 flow [2021-10-15 19:50:05,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 240 transitions, 1030 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:50:05,124 INFO L242 Difference]: Finished difference. Result has 163 places, 235 transitions, 805 flow [2021-10-15 19:50:05,125 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=799, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=805, PETRI_PLACES=163, PETRI_TRANSITIONS=235} [2021-10-15 19:50:05,125 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 26 predicate places. [2021-10-15 19:50:05,125 INFO L470 AbstractCegarLoop]: Abstraction has has 163 places, 235 transitions, 805 flow [2021-10-15 19:50:05,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 150.0) internal successors, (1200), 8 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:50:05,127 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:50:05,127 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:50:05,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-15 19:50:05,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:50:05,328 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:50:05,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:50:05,328 INFO L82 PathProgramCache]: Analyzing trace with hash 2147379258, now seen corresponding path program 1 times [2021-10-15 19:50:05,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:50:05,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1659258575] [2021-10-15 19:50:05,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:50:05,333 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:50:05,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:50:05,334 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:50:05,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-15 19:50:06,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:50:06,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-15 19:50:06,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:50:06,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-15 19:50:06,281 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-15 19:50:06,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-10-15 19:50:06,646 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-15 19:50:06,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-10-15 19:50:06,899 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-10-15 19:50:06,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:50:07,442 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-10-15 19:50:07,443 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:50:07,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1659258575] [2021-10-15 19:50:07,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1659258575] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:50:07,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:50:07,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-10-15 19:50:07,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790192861] [2021-10-15 19:50:07,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:50:07,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:50:07,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:50:07,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:50:07,447 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 254 [2021-10-15 19:50:07,450 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 235 transitions, 805 flow. Second operand has 7 states, 7 states have (on average 157.42857142857142) internal successors, (1102), 7 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:50:07,450 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:50:07,450 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 254 [2021-10-15 19:50:07,450 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:50:17,678 INFO L129 PetriNetUnfolder]: 1250/3679 cut-off events. [2021-10-15 19:50:17,678 INFO L130 PetriNetUnfolder]: For 753/753 co-relation queries the response was YES. [2021-10-15 19:50:17,688 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6052 conditions, 3679 events. 1250/3679 cut-off events. For 753/753 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 18911 event pairs, 0 based on Foata normal form. 0/3421 useless extension candidates. Maximal degree in co-relation 6037. Up to 853 conditions per place. [2021-10-15 19:50:17,705 INFO L132 encePairwiseOnDemand]: 221/254 looper letters, 218 selfloop transitions, 55 changer transitions 0/407 dead transitions. [2021-10-15 19:50:17,705 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 407 transitions, 1695 flow [2021-10-15 19:50:17,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:50:17,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 19:50:17,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1290 transitions. [2021-10-15 19:50:17,711 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7255343082114736 [2021-10-15 19:50:17,711 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1290 transitions. [2021-10-15 19:50:17,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1290 transitions. [2021-10-15 19:50:17,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:50:17,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1290 transitions. [2021-10-15 19:50:17,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 184.28571428571428) internal successors, (1290), 7 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:50:17,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 254.0) internal successors, (2032), 8 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:50:17,723 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 254.0) internal successors, (2032), 8 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:50:17,723 INFO L186 Difference]: Start difference. First operand has 163 places, 235 transitions, 805 flow. Second operand 7 states and 1290 transitions. [2021-10-15 19:50:17,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 407 transitions, 1695 flow [2021-10-15 19:50:17,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 407 transitions, 1687 flow, removed 4 selfloop flow, removed 4 redundant places. [2021-10-15 19:50:17,742 INFO L242 Difference]: Finished difference. Result has 166 places, 288 transitions, 1141 flow [2021-10-15 19:50:17,743 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=797, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1141, PETRI_PLACES=166, PETRI_TRANSITIONS=288} [2021-10-15 19:50:17,743 INFO L334 CegarLoopForPetriNet]: 137 programPoint places, 29 predicate places. [2021-10-15 19:50:17,743 INFO L470 AbstractCegarLoop]: Abstraction has has 166 places, 288 transitions, 1141 flow [2021-10-15 19:50:17,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 157.42857142857142) internal successors, (1102), 7 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:50:17,744 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:50:17,745 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:50:17,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-15 19:50:17,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:50:17,961 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:50:17,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:50:17,962 INFO L82 PathProgramCache]: Analyzing trace with hash 188804472, now seen corresponding path program 1 times [2021-10-15 19:50:17,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:50:17,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1658281562] [2021-10-15 19:50:17,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:50:17,963 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:50:17,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:50:17,965 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:50:18,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-15 19:50:19,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:50:19,905 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 19:50:21,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:50:21,643 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-10-15 19:50:21,643 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-15 19:50:21,644 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:50:21,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-15 19:50:21,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:50:21,880 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:50:22,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:50:22 BoogieIcfgContainer [2021-10-15 19:50:22,037 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:50:22,038 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:50:22,038 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:50:22,039 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:50:22,039 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:49:47" (3/4) ... [2021-10-15 19:50:22,045 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-15 19:50:22,204 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:50:22,204 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:50:22,205 INFO L168 Benchmark]: Toolchain (without parser) took 40699.82 ms. Allocated memory was 77.6 MB in the beginning and 134.2 MB in the end (delta: 56.6 MB). Free memory was 57.4 MB in the beginning and 81.1 MB in the end (delta: -23.7 MB). Peak memory consumption was 89.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:50:22,206 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 77.6 MB. Free memory was 57.7 MB in the beginning and 57.6 MB in the end (delta: 60.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:50:22,207 INFO L168 Benchmark]: CACSL2BoogieTranslator took 754.41 ms. Allocated memory is still 77.6 MB. Free memory was 57.1 MB in the beginning and 37.4 MB in the end (delta: 19.7 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:50:22,208 INFO L168 Benchmark]: Boogie Procedure Inliner took 148.65 ms. Allocated memory is still 77.6 MB. Free memory was 37.4 MB in the beginning and 32.9 MB in the end (delta: 4.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:50:22,209 INFO L168 Benchmark]: Boogie Preprocessor took 137.82 ms. Allocated memory is still 77.6 MB. Free memory was 32.9 MB in the beginning and 52.9 MB in the end (delta: -20.0 MB). Peak memory consumption was 12.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:50:22,209 INFO L168 Benchmark]: RCFGBuilder took 4551.58 ms. Allocated memory was 77.6 MB in the beginning and 111.1 MB in the end (delta: 33.6 MB). Free memory was 52.9 MB in the beginning and 75.2 MB in the end (delta: -22.3 MB). Peak memory consumption was 37.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:50:22,210 INFO L168 Benchmark]: TraceAbstraction took 34934.88 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 74.4 MB in the beginning and 46.9 MB in the end (delta: 27.5 MB). Peak memory consumption was 49.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:50:22,210 INFO L168 Benchmark]: Witness Printer took 166.50 ms. Allocated memory is still 134.2 MB. Free memory was 46.9 MB in the beginning and 81.1 MB in the end (delta: -34.2 MB). Peak memory consumption was 22.3 MB. Max. memory is 16.1 GB. [2021-10-15 19:50:22,215 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 77.6 MB. Free memory was 57.7 MB in the beginning and 57.6 MB in the end (delta: 60.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 754.41 ms. Allocated memory is still 77.6 MB. Free memory was 57.1 MB in the beginning and 37.4 MB in the end (delta: 19.7 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 148.65 ms. Allocated memory is still 77.6 MB. Free memory was 37.4 MB in the beginning and 32.9 MB in the end (delta: 4.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 137.82 ms. Allocated memory is still 77.6 MB. Free memory was 32.9 MB in the beginning and 52.9 MB in the end (delta: -20.0 MB). Peak memory consumption was 12.4 MB. Max. memory is 16.1 GB. * RCFGBuilder took 4551.58 ms. Allocated memory was 77.6 MB in the beginning and 111.1 MB in the end (delta: 33.6 MB). Free memory was 52.9 MB in the beginning and 75.2 MB in the end (delta: -22.3 MB). Peak memory consumption was 37.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 34934.88 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 74.4 MB in the beginning and 46.9 MB in the end (delta: 27.5 MB). Peak memory consumption was 49.4 MB. Max. memory is 16.1 GB. * Witness Printer took 166.50 ms. Allocated memory is still 134.2 MB. Free memory was 46.9 MB in the beginning and 81.1 MB in the end (delta: -34.2 MB). Peak memory consumption was 22.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 1757]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L1054] static int init = 1; [L1055] static SSL_METHOD SSLv3_server_data ; VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1077] SSL *s ; [L1078] int tmp ; [L1082] s = malloc(sizeof(SSL)) [L1083] s->s3 = malloc(sizeof(struct ssl3_state_st)) [L1084] s->ctx = malloc(sizeof(SSL_CTX)) [L1085] s->session = malloc(sizeof(SSL_SESSION)) [L1087] s->info_callback = (void (*) ()) __VERIFIER_nondet_ulong() [L1088] s->options = __VERIFIER_nondet_ulong() [L1089] s->verify_mode = __VERIFIER_nondet_int() [L1090] EXPR s->session [L1090] (s->session)->peer = (struct x509_st*) __VERIFIER_nondet_ulong() [L1091] EXPR s->s3 [L1091] (s->s3)->tmp.cert_request = __VERIFIER_nondet_int() [L1092] EXPR s->s3 [L1092] (s->s3)->tmp.new_cipher = malloc(sizeof(struct ssl_cipher_st)) [L1093] EXPR s->s3 [L1093] EXPR (s->s3)->tmp.new_cipher [L1093] ((s->s3)->tmp.new_cipher)->algorithms = __VERIFIER_nondet_ulong() [L1094] EXPR s->s3 [L1094] EXPR (s->s3)->tmp.new_cipher [L1094] ((s->s3)->tmp.new_cipher)->algo_strength = __VERIFIER_nondet_ulong() [L1095] COND FALSE !(__VERIFIER_nondet_int()) [L1101] s->cert = malloc(sizeof(struct cert_st)) [L1102] EXPR s->cert [L1102] (s->cert)->pkeys[0].privatekey = (struct evp_pkey_st*) __VERIFIER_nondet_ulong() [L1111] BUF_MEM *buf ; [L1112] unsigned long l ; [L1113] unsigned long Time ; [L1114] unsigned long tmp ; [L1115] void (*cb)() ; [L1116] long num1 ; [L1117] int ret ; [L1118] int new_state ; [L1119] int state ; [L1120] int skip ; [L1121] int got_new_session ; [L1122] int tmp___1 = __VERIFIER_nondet_int() ; [L1123] int tmp___2 = __VERIFIER_nondet_int() ; [L1124] int tmp___3 = __VERIFIER_nondet_int() ; [L1125] int tmp___4 = __VERIFIER_nondet_int() ; [L1126] int tmp___5 = __VERIFIER_nondet_int() ; [L1127] int tmp___6 = __VERIFIER_nondet_int() ; [L1128] int tmp___7 ; [L1129] long tmp___8 = __VERIFIER_nondet_long() ; [L1130] int tmp___9 = __VERIFIER_nondet_int() ; [L1131] int tmp___10 = __VERIFIER_nondet_int() ; [L1132] int blastFlag ; [L1136] s->state = 8464 [L1137] blastFlag = 0 [L1138] s->hit=__VERIFIER_nondet_int () [L1139] s->state = 8464 [L1140] tmp = __VERIFIER_nondet_int() [L1141] Time = tmp [L1142] cb = (void (*)())((void *)0) [L1143] ret = -1 [L1144] skip = 0 [L1145] got_new_session = 0 [L1146] EXPR s->info_callback VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1146] COND FALSE !((unsigned long )s->info_callback != (unsigned long )((void *)0)) [L1151] EXPR s->in_handshake [L1151] s->in_handshake += 1 [L1152] COND FALSE !(tmp___1 & 12288) VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1161] EXPR s->cert VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1161] COND FALSE !((unsigned long )s->cert == (unsigned long )((void *)0)) [L1167] COND TRUE 1 VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1169] EXPR s->state [L1169] state = s->state [L1170] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1170] COND FALSE !(s->state == 12292) [L1173] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1173] COND FALSE !(s->state == 16384) [L1176] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1176] COND FALSE !(s->state == 8192) [L1179] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1179] COND FALSE !(s->state == 24576) [L1182] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1182] COND FALSE !(s->state == 8195) [L1185] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1185] COND FALSE !(s->state == 8480) [L1188] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1188] COND FALSE !(s->state == 8481) [L1191] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1191] COND FALSE !(s->state == 8482) [L1194] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1194] COND TRUE s->state == 8464 [L1354] s->shutdown = 0 [L1355] ret = __VERIFIER_nondet_int() [L1356] COND TRUE blastFlag == 0 [L1357] blastFlag = 1 VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1361] COND FALSE !(ret <= 0) [L1366] got_new_session = 1 [L1367] s->state = 8496 [L1368] s->init_num = 0 VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1716] EXPR s->s3 [L1716] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1716] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1745] skip = 0 VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1167] COND TRUE 1 VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1169] EXPR s->state [L1169] state = s->state [L1170] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1170] COND FALSE !(s->state == 12292) [L1173] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1173] COND FALSE !(s->state == 16384) [L1176] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1176] COND FALSE !(s->state == 8192) [L1179] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1179] COND FALSE !(s->state == 24576) [L1182] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1182] COND FALSE !(s->state == 8195) [L1185] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1185] COND FALSE !(s->state == 8480) [L1188] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1188] COND FALSE !(s->state == 8481) [L1191] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1191] COND FALSE !(s->state == 8482) [L1194] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1194] COND FALSE !(s->state == 8464) [L1197] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1197] COND FALSE !(s->state == 8465) [L1200] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1200] COND FALSE !(s->state == 8466) [L1203] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1203] COND TRUE s->state == 8496 [L1372] ret = __VERIFIER_nondet_int() [L1373] COND TRUE blastFlag == 1 [L1374] blastFlag = 2 VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1378] COND FALSE !(ret <= 0) [L1383] s->hit VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1383] COND FALSE !(s->hit) [L1386] s->state = 8512 VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1388] s->init_num = 0 VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1716] EXPR s->s3 [L1716] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1716] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1745] skip = 0 VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1167] COND TRUE 1 VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1169] EXPR s->state [L1169] state = s->state [L1170] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1170] COND FALSE !(s->state == 12292) [L1173] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1173] COND FALSE !(s->state == 16384) [L1176] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1176] COND FALSE !(s->state == 8192) [L1179] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1179] COND FALSE !(s->state == 24576) [L1182] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1182] COND FALSE !(s->state == 8195) [L1185] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1185] COND FALSE !(s->state == 8480) [L1188] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1188] COND FALSE !(s->state == 8481) [L1191] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1191] COND FALSE !(s->state == 8482) [L1194] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1194] COND FALSE !(s->state == 8464) [L1197] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1197] COND FALSE !(s->state == 8465) [L1200] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1200] COND FALSE !(s->state == 8466) [L1203] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1203] COND FALSE !(s->state == 8496) [L1206] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1206] COND FALSE !(s->state == 8497) [L1209] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1209] COND TRUE s->state == 8512 [L1392] EXPR s->s3 [L1392] EXPR (s->s3)->tmp.new_cipher [L1392] EXPR ((s->s3)->tmp.new_cipher)->algorithms VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1392] COND FALSE !(((s->s3)->tmp.new_cipher)->algorithms & 256UL) [L1395] ret = __VERIFIER_nondet_int() [L1396] COND TRUE blastFlag == 2 [L1397] blastFlag = 6 VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1401] COND FALSE !(ret <= 0) VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1407] s->state = 8528 [L1408] s->init_num = 0 VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1716] EXPR s->s3 [L1716] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1716] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1745] skip = 0 VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1167] COND TRUE 1 VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1169] EXPR s->state [L1169] state = s->state [L1170] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1170] COND FALSE !(s->state == 12292) [L1173] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1173] COND FALSE !(s->state == 16384) [L1176] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1176] COND FALSE !(s->state == 8192) [L1179] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1179] COND FALSE !(s->state == 24576) [L1182] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1182] COND FALSE !(s->state == 8195) [L1185] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1185] COND FALSE !(s->state == 8480) [L1188] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1188] COND FALSE !(s->state == 8481) [L1191] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1191] COND FALSE !(s->state == 8482) [L1194] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1194] COND FALSE !(s->state == 8464) [L1197] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1197] COND FALSE !(s->state == 8465) [L1200] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1200] COND FALSE !(s->state == 8466) [L1203] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1203] COND FALSE !(s->state == 8496) [L1206] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1206] COND FALSE !(s->state == 8497) [L1209] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1209] COND FALSE !(s->state == 8512) [L1212] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1212] COND FALSE !(s->state == 8513) [L1215] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1215] COND TRUE s->state == 8528 [L1412] EXPR s->s3 [L1412] EXPR (s->s3)->tmp.new_cipher [L1412] EXPR ((s->s3)->tmp.new_cipher)->algorithms [L1412] l = ((s->s3)->tmp.new_cipher)->algorithms [L1413] EXPR s->options VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1413] COND TRUE s->options & 2097152UL [L1414] EXPR s->s3 [L1414] (s->s3)->tmp.use_rsa_tmp = 1 [L1418] EXPR s->s3 [L1418] (s->s3)->tmp.use_rsa_tmp VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1418] COND TRUE (s->s3)->tmp.use_rsa_tmp [L1436] ret = __VERIFIER_nondet_int() [L1437] COND TRUE blastFlag == 6 [L1438] blastFlag = 7 VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1442] COND FALSE !(ret <= 0) VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1459] s->state = 8544 [L1460] s->init_num = 0 VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1716] EXPR s->s3 [L1716] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1716] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1745] skip = 0 VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1167] COND TRUE 1 VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1169] EXPR s->state [L1169] state = s->state [L1170] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1170] COND FALSE !(s->state == 12292) [L1173] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1173] COND FALSE !(s->state == 16384) [L1176] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1176] COND FALSE !(s->state == 8192) [L1179] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1179] COND FALSE !(s->state == 24576) [L1182] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1182] COND FALSE !(s->state == 8195) [L1185] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1185] COND FALSE !(s->state == 8480) [L1188] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1188] COND FALSE !(s->state == 8481) [L1191] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1191] COND FALSE !(s->state == 8482) [L1194] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1194] COND FALSE !(s->state == 8464) [L1197] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1197] COND FALSE !(s->state == 8465) [L1200] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1200] COND FALSE !(s->state == 8466) [L1203] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1203] COND FALSE !(s->state == 8496) [L1206] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1206] COND FALSE !(s->state == 8497) [L1209] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1209] COND FALSE !(s->state == 8512) [L1212] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1212] COND FALSE !(s->state == 8513) [L1215] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1215] COND FALSE !(s->state == 8528) [L1218] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1218] COND FALSE !(s->state == 8529) [L1221] EXPR s->state VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1221] COND TRUE s->state == 8544 [L1464] EXPR s->verify_mode VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1464] COND TRUE s->verify_mode & 1 [L1465] EXPR s->session [L1465] EXPR (s->session)->peer VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1465] COND FALSE !((unsigned long )(s->session)->peer != (unsigned long )((void *)0)) [L1475] EXPR s->s3 [L1475] EXPR (s->s3)->tmp.new_cipher [L1475] EXPR ((s->s3)->tmp.new_cipher)->algorithms VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1475] COND FALSE !(((s->s3)->tmp.new_cipher)->algorithms & 256UL) [L1485] EXPR s->s3 [L1485] (s->s3)->tmp.cert_request = 1 [L1486] ret = __VERIFIER_nondet_int() [L1487] COND TRUE blastFlag == 7 VAL [init=1, SSLv3_server_data={-2147483617:0}] [L1757] reach_error() VAL [init=1, SSLv3_server_data={-2147483617:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 150 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 27.5ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 34720.2ms, OverallIterations: 6, TraceHistogramMax: 5, EmptinessCheckTime: 0.0ms, AutomataDifference: 22322.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 86.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 113 SDtfs, 145 SDslu, 244 SDs, 0 SdLazy, 1087 SolverSat, 143 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 19637.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 916 GetRequests, 893 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 533.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1141occurred in iteration=5, InterpolantAutomatonStates: 25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 312.7ms SsaConstructionTime, 2657.6ms SatisfiabilityAnalysisTime, 5227.9ms InterpolantComputationTime, 590 NumberOfCodeBlocks, 590 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 912 ConstructedInterpolants, 1 QuantifiedInterpolants, 2131 SizeOfPredicates, 15 NumberOfNonLiveVariables, 1341 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 PerfectInterpolantSequences, 814/814 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-15 19:50:22,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c9a47d-58c2-4a8a-b332-c6bb2adb15b1/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...